avcodec/mjpegdec: Unify switch statements

This has been forgotten in d5a3a20d.

Found via PVS-Studio (see ticket #8156).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/mjpegdec.c

@@ -555,11 +555,6 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
         case 0x22122100:
         case 0x21211100:
         case 0x22211200:
-            if (s->bits <= 8) s->avctx->pix_fmt = s->cs_itu601 ? AV_PIX_FMT_YUV444P : AV_PIX_FMT_YUVJ444P;
-            else
-                goto unk_pixfmt;
-            s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
-            break;
         case 0x22221100:
         case 0x22112200:
         case 0x11222200: