Move documentation file list to relevant make file

Change-Id: I2fe3095c4eb60233f00830d4124583ce7a64caa4

libs.mk

@@ -29,6 +29,7 @@ $(eval $(if $(filter universal%,$(TOOLCHAIN)),LIPO_LIBVPX,BUILD_LIBVPX):=yes)
 
 include $(SRC_PATH_BARE)/vpx/vpx_codec.mk
 CODEC_SRCS-yes += $(addprefix vpx/,$(call enabled,API_SRCS))
+CODEC_DOC_SRCS += $(addprefix vpx/,$(call enabled,API_DOC_SRCS))
 
 include $(SRC_PATH_BARE)/vpx_mem/vpx_mem.mk
 CODEC_SRCS-yes += $(addprefix vpx_mem/,$(call enabled,MEM_SRCS))
@@ -47,7 +48,6 @@ ifeq ($(CONFIG_VP8_ENCODER),yes)
   CODEC_EXPORTS-yes += $(addprefix $(VP8_PREFIX),$(VP8_CX_EXPORTS))
   INSTALL-LIBS-yes += include/vpx/vp8.h include/vpx/vp8cx.h
   INSTALL_MAPS += include/vpx/% $(SRC_PATH_BARE)/$(VP8_PREFIX)/%
-  CODEC_DOC_SRCS += vpx/vp8.h vpx/vp8cx.h
   CODEC_DOC_SECTIONS += vp8 vp8_encoder
 endif
 
@@ -58,7 +58,6 @@ ifeq ($(CONFIG_VP8_DECODER),yes)
   CODEC_EXPORTS-yes += $(addprefix $(VP8_PREFIX),$(VP8_DX_EXPORTS))
   INSTALL-LIBS-yes += include/vpx/vp8.h include/vpx/vp8dx.h
   INSTALL_MAPS += include/vpx/% $(SRC_PATH_BARE)/$(VP8_PREFIX)/%
-  CODEC_DOC_SRCS += vpx/vp8.h vpx/vp8dx.h
   CODEC_DOC_SECTIONS += vp8 vp8_decoder
 endif
 
@@ -332,11 +331,6 @@ $(BUILD_PFX)vpx_rtcd.h: $(SRC_PATH_BARE)/$(sort $(filter %rtcd_defs.sh,$(CODEC_S
           $(RTCD_OPTIONS) $^ > $@
 CLEAN-OBJS += $(BUILD_PFX)vpx_rtcd.h
 
-CODEC_DOC_SRCS += vpx/vpx_codec.h \
-                  vpx/vpx_decoder.h \
-                  vpx/vpx_encoder.h \
-                  vpx/vpx_image.h
-
 ##
 ## libvpx test directives
 ##

vpx/vpx_codec.mk

@@ -13,9 +13,18 @@ API_EXPORTS += exports
 
 API_SRCS-$(CONFIG_VP8_ENCODER) += vp8.h
 API_SRCS-$(CONFIG_VP8_ENCODER) += vp8cx.h
+API_DOC_SRCS-$(CONFIG_VP8_ENCODER) += vp8.h
+API_DOC_SRCS-$(CONFIG_VP8_ENCODER) += vp8cx.h
 
 API_SRCS-$(CONFIG_VP8_DECODER) += vp8.h
 API_SRCS-$(CONFIG_VP8_DECODER) += vp8dx.h
+API_DOC_SRCS-$(CONFIG_VP8_DECODER) += vp8.h
+API_DOC_SRCS-$(CONFIG_VP8_DECODER) += vp8dx.h
+
+API_DOC_SRCS-yes += vpx_codec.h
+API_DOC_SRCS-yes += vpx_decoder.h
+API_DOC_SRCS-yes += vpx_encoder.h
+API_DOC_SRCS-yes += vpx_image.h
 
 API_SRCS-yes                += src/vpx_decoder.c
 API_SRCS-yes                += vpx_decoder.h