configure: select missing rdft for several filters

afir, sinc, superequalizer, surround

For afir fft is replaced with rdft as:
rdft_select="fft"
Signed-off-by: Lou Logan <lou@lrcd.com>

configure

@@ -3437,7 +3437,7 @@ afftdn_filter_select="fft"
 afftfilt_filter_deps="avcodec"
 afftfilt_filter_select="fft"
 afir_filter_deps="avcodec"
-afir_filter_select="fft"
+afir_filter_select="rdft"
 amovie_filter_deps="avcodec avformat"
 aresample_filter_deps="swresample"
 asr_filter_deps="pocketsphinx"
@@ -3546,6 +3546,7 @@ showspectrum_filter_select="fft"
 showspectrumpic_filter_deps="avcodec"
 showspectrumpic_filter_select="fft"
 signature_filter_deps="gpl avcodec avformat"
+sinc_filter_select="rdft"
 smartblur_filter_deps="gpl swscale"
 sobel_opencl_filter_deps="opencl"
 sofalizer_filter_deps="libmysofa avcodec"
@@ -3560,6 +3561,8 @@ stereo3d_filter_deps="gpl"
 subtitles_filter_deps="avformat avcodec libass"
 super2xsai_filter_deps="gpl"
 pixfmts_super2xsai_test_deps="super2xsai_filter"
+superequalizer_filter_select="rdft"
+surround_filter_select="rdft"
 tinterlace_filter_deps="gpl"
 tinterlace_merge_test_deps="tinterlace_filter"
 tinterlace_pad_test_deps="tinterlace_filter"