x86/hevc_sao: move 10/12bit functions into a separate file

Tested-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: James Almer <jamrial@gmail.com>

libavcodec/x86/Makefile

@@ -140,7 +140,8 @@ YASM-OBJS-$(CONFIG_HEVC_DECODER)       += x86/hevc_mc.o                 \
                                           x86/hevc_deblock.o            \
                                           x86/hevc_idct.o               \
                                           x86/hevc_res_add.o            \
-                                          x86/hevc_sao.o
+                                          x86/hevc_sao.o                \
+                                          x86/hevc_sao_10bit.o
 YASM-OBJS-$(CONFIG_JPEG2000_DECODER)   += x86/jpeg2000dsp.o
 YASM-OBJS-$(CONFIG_MLP_DECODER)        += x86/mlpdsp.o
 YASM-OBJS-$(CONFIG_MPEG4_DECODER)      += x86/xvididct.o