i420_rgb: separate mmx and sse2 asm code

modules/sse2/Modules.am

@@ -2,7 +2,7 @@ libi420_rgb_sse2_plugin_la_SOURCES = \
         ../video_chroma/i420_rgb.c \
 	../video_chroma/i420_rgb.h \
         ../video_chroma/i420_rgb16.c \
-        ../mmx/i420_rgb_mmx.h
+        ../sse2/i420_rgb_sse2.h
 libi420_rgb_sse2_plugin_la_CFLAGS = $(AM_CFLAGS)
 libi420_rgb_sse2_plugin_la_LIBADD = $(AM_LIBADD)
 

modules/video_chroma/i420_rgb16.c

@@ -42,7 +42,7 @@
 #   include "../mmx/i420_rgb_mmx.h"
 #   define VLC_TARGET VLC_MMX
 #elif defined (MODULE_NAME_IS_i420_rgb_sse2)
-#   include "../mmx/i420_rgb_mmx.h"
+#   include "../sse2/i420_rgb_sse2.h"
 #   define VLC_TARGET VLC_SSE
 #endif