ffmpeg: drop call to disable PATENTED_ENCODERS

Presently, this attempts to disable atrac3, h264, hevc and vc1. These
encoders don't exist or are done through other programs (eg libx264).
Handling of those other programs is done elsewhere.

Signed-off-by: Ian Leonard <antonlacon@gmail.com>

multimedia/ffmpeg/Makefile

@@ -203,8 +203,6 @@ FFMPEG_PATENTED_DECODERS:= \
 	hevc \
 	vc1 \
 
-FFMPEG_PATENTED_ENCODERS:=$(FFMPEG_PATENTED_DECODERS)
-
 FFMPEG_PATENTED_MUXERS:= \
 	h264 \
 	hevc \
@@ -461,7 +459,6 @@ ifeq ($(BUILD_VARIANT),full)
 		--enable-gnutls \
 		$(if $(CONFIG_BUILD_PATENTED),, \
 			$(call FFMPEG_DISABLE,decoder,$(FFMPEG_PATENTED_DECODERS)) \
-			$(call FFMPEG_DISABLE,encoder,$(FFMPEG_PATENTED_ENCODERS)) \
 			$(call FFMPEG_DISABLE,muxer,$(FFMPEG_PATENTED_MUXERS)) \
 			$(call FFMPEG_DISABLE,demuxer,$(FFMPEG_PATENTED_DEMUXERS)) \
 			$(call FFMPEG_DISABLE,parser,$(FFMPEG_PATENTED_PARSERS))) \