swscale: Remove HAVE_MMX from files that are only compiled with MMX enabled.

libswscale/x86/rgb2rgb.c

@@ -127,7 +127,7 @@ void rgb2rgb_init_x86(void)
 {
     int cpu_flags = av_get_cpu_flags();
 
-    if (HAVE_MMX      && cpu_flags & AV_CPU_FLAG_MMX)
+    if (cpu_flags & AV_CPU_FLAG_MMX)
         rgb2rgb_init_MMX();
     if (HAVE_AMD3DNOW && cpu_flags & AV_CPU_FLAG_3DNOW)
         rgb2rgb_init_3DNOW();

libswscale/x86/yuv2rgb_mmx.c

@@ -81,7 +81,7 @@ SwsFunc ff_yuv2rgb_init_mmx(SwsContext *c)
     }
 #endif
 
-    if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
+    if (cpu_flags & AV_CPU_FLAG_MMX) {
         switch (c->dstFormat) {
             case PIX_FMT_RGB32:
                 if (c->srcFormat == PIX_FMT_YUVA420P) {