configure: mpegvideo depends on mpeg_er.

Fixes compilation with --disable-everything --enable-encoder=mjpeg
While there, clean up some recursive dependencies.
Reported-by: Bernhard Döbler, programmer bardware de

configure

@@ -2141,7 +2141,7 @@ me_cmp_select="fdctdsp idctdsp pixblockdsp"
 mpeg_er_select="error_resilience"
 mpegaudio_select="mpegaudiodsp"
 mpegaudiodsp_select="dct"
-mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp videodsp"
+mpegvideo_select="blockdsp h264chroma hpeldsp idctdsp me_cmp mpeg_er videodsp"
 mpegvideoenc_select="me_cmp mpegvideo pixblockdsp qpeldsp"
 qsvdec_select="qsv"
 qsvenc_select="qsv"
@@ -2215,9 +2215,9 @@ fourxm_decoder_select="blockdsp bswapdsp"
 fraps_decoder_select="bswapdsp huffman"
 g2m_decoder_select="blockdsp idctdsp jpegtables zlib"
 g729_decoder_select="audiodsp"
-h261_decoder_select="mpeg_er mpegvideo"
+h261_decoder_select="mpegvideo"
 h261_encoder_select="aandcttables mpegvideoenc"
-h263_decoder_select="error_resilience h263_parser h263dsp mpeg_er mpegvideo qpeldsp"
+h263_decoder_select="h263_parser h263dsp mpegvideo qpeldsp"
 h263_encoder_select="aandcttables h263dsp mpegvideoenc"
 h263i_decoder_select="h263_decoder"
 h263p_decoder_select="h263_decoder"
@@ -2272,10 +2272,10 @@ mpc7_decoder_select="bswapdsp mpegaudiodsp"
 mpc8_decoder_select="mpegaudiodsp"
 mpeg_xvmc_decoder_deps="X11_extensions_XvMClib_h"
 mpeg_xvmc_decoder_select="mpeg2video_decoder"
-mpegvideo_decoder_select="error_resilience mpeg_er mpegvideo"
-mpeg1video_decoder_select="error_resilience mpeg_er mpegvideo"
+mpegvideo_decoder_select="mpegvideo"
+mpeg1video_decoder_select="mpegvideo"
 mpeg1video_encoder_select="aandcttables mpegvideoenc h263dsp"
-mpeg2video_decoder_select="error_resilience mpeg_er mpegvideo"
+mpeg2video_decoder_select="mpegvideo"
 mpeg2video_encoder_select="aandcttables mpegvideoenc h263dsp"
 mpeg2_qsv_decoder_deps="libmfx"
 mpeg2_qsv_decoder_select="qsvdec mpeg2_qsv_hwaccel"
@@ -2289,7 +2289,7 @@ msmpeg4v2_decoder_select="h263_decoder"
 msmpeg4v2_encoder_select="h263_encoder"
 msmpeg4v3_decoder_select="h263_decoder"
 msmpeg4v3_encoder_select="h263_encoder"
-mss2_decoder_select="error_resilience mpeg_er qpeldsp vc1_decoder"
+mss2_decoder_select="vc1_decoder"
 mts2_decoder_select="mss34dsp"
 mxpeg_decoder_select="mjpeg_decoder"
 nellymoser_decoder_select="mdct sinewin"
@@ -2309,12 +2309,12 @@ ra_144_decoder_select="audiodsp"
 ralf_decoder_select="golomb"
 rawvideo_decoder_select="bswapdsp"
 rtjpeg_decoder_select="me_cmp"
-rv10_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
+rv10_decoder_select="h263_decoder"
 rv10_encoder_select="h263_encoder"
-rv20_decoder_select="error_resilience h263_decoder h263dsp mpeg_er"
+rv20_decoder_select="h263_decoder"
 rv20_encoder_select="h263_encoder"
-rv30_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
-rv40_decoder_select="error_resilience golomb h264chroma h264pred h264qpel mpeg_er mpegvideo rv34dsp videodsp"
+rv30_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
+rv40_decoder_select="golomb h264pred h264qpel mpegvideo rv34dsp"
 shorten_decoder_select="golomb"
 sipr_decoder_select="lsp"
 snow_decoder_select="dwt h264qpel hpeldsp me_cmp rangecoder videodsp"
@@ -2342,7 +2342,7 @@ txd_decoder_select="texturedsp"
 utvideo_decoder_select="bswapdsp"
 utvideo_encoder_select="bswapdsp huffman huffyuvencdsp"
 vble_decoder_select="huffyuvdsp"
-vc1_decoder_select="blockdsp error_resilience h263_decoder h264chroma h264qpel intrax8 mpeg_er qpeldsp startcode"
+vc1_decoder_select="blockdsp h263_decoder h264qpel intrax8 qpeldsp startcode"
 vc1image_decoder_select="vc1_decoder"
 vc1_qsv_decoder_deps="libmfx"
 vc1_qsv_decoder_select="qsvdec vc1_qsv_hwaccel"
@@ -2486,7 +2486,7 @@ wmv3_vdpau_hwaccel_select="vc1_vdpau_hwaccel"
 h264_parser_select="h264_decoder"
 hevc_parser_select="golomb"
 mpegvideo_parser_select="mpegvideo"
-mpeg4video_parser_select="error_resilience h263dsp mpeg_er mpegvideo qpeldsp"
+mpeg4video_parser_select="h263dsp mpegvideo qpeldsp"
 vc1_parser_select="mpegvideo startcode vc1_decoder"
 
 # bitstream_filters