avformat/Makefile, amr: Add missing amr-demuxers->rawdec.o dependency

Forgotten in 1f447fd954.
Also only enable amr_probe() and amr_read_header() in case
the AMR demuxer is enabled; this avoids having to add
a rawdec.o dependency to the muxer.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavformat/Makefile

@@ -88,10 +88,10 @@ OBJS-$(CONFIG_AIFF_MUXER)                += aiffenc.o aiff.o id3v2enc.o
 OBJS-$(CONFIG_AIX_DEMUXER)               += aixdec.o
 OBJS-$(CONFIG_ALP_DEMUXER)               += alp.o
 OBJS-$(CONFIG_ALP_MUXER)                 += alp.o
-OBJS-$(CONFIG_AMR_DEMUXER)               += amr.o
+OBJS-$(CONFIG_AMR_DEMUXER)               += amr.o rawdec.o
 OBJS-$(CONFIG_AMR_MUXER)                 += amr.o rawenc.o
-OBJS-$(CONFIG_AMRNB_DEMUXER)             += amr.o
-OBJS-$(CONFIG_AMRWB_DEMUXER)             += amr.o
+OBJS-$(CONFIG_AMRNB_DEMUXER)             += amr.o rawdec.o
+OBJS-$(CONFIG_AMRWB_DEMUXER)             += amr.o rawdec.o
 OBJS-$(CONFIG_AMV_MUXER)                 += amvenc.o
 OBJS-$(CONFIG_ANM_DEMUXER)               += anm.o
 OBJS-$(CONFIG_APC_DEMUXER)               += apc.o

libavformat/amr.c

@@ -66,6 +66,7 @@ static int amr_write_header(AVFormatContext *s)
 }
 #endif /* CONFIG_AMR_MUXER */
 
+#if CONFIG_AMR_DEMUXER
 static int amr_probe(const AVProbeData *p)
 {
     // Only check for "#!AMR" which could be amr-wb, amr-nb.
@@ -140,7 +141,6 @@ static int amr_read_header(AVFormatContext *s)
     return 0;
 }
 
-#if CONFIG_AMR_DEMUXER
 const AVInputFormat ff_amr_demuxer = {
     .name           = "amr",
     .long_name      = NULL_IF_CONFIG_SMALL("3GPP AMR"),