avcodec/x86/hevcdsp_init: fix SSE4 checks

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

libavcodec/x86/hevcdsp_init.c

@@ -346,11 +346,7 @@ void ff_hevcdsp_init_x86(HEVCDSPContext *c, const int bit_depth)
     int mm_flags = av_get_cpu_flags();
 
     if (bit_depth == 8) {
-        if (EXTERNAL_MMX(mm_flags)) {
-
-            if (EXTERNAL_MMXEXT(mm_flags)) {
-
-                if (EXTERNAL_SSSE3(mm_flags) && ARCH_X86_64) {
+        if (EXTERNAL_SSE4(mm_flags) && ARCH_X86_64) {
 
             EPEL_LINKS(c->put_hevc_epel, 0, 0, pel_pixels,  8);
             EPEL_LINKS(c->put_hevc_epel, 0, 1, epel_h,      8);
@@ -363,13 +359,8 @@ void ff_hevcdsp_init_x86(HEVCDSPContext *c, const int bit_depth)
             QPEL_LINKS(c->put_hevc_qpel, 1, 1, qpel_hv,    8);
 
         }
-            }
-        }
     } else if (bit_depth == 10) {
-        if (EXTERNAL_MMX(mm_flags)) {
-            if (EXTERNAL_MMXEXT(mm_flags) && ARCH_X86_64) {
-
-                if (EXTERNAL_SSSE3(mm_flags)) {
+        if (EXTERNAL_SSE4(mm_flags) && ARCH_X86_64) {
 
             EPEL_LINKS(c->put_hevc_epel, 0, 0, pel_pixels, 10);
             EPEL_LINKS(c->put_hevc_epel, 0, 1, epel_h,     10);
@@ -381,8 +372,5 @@ void ff_hevcdsp_init_x86(HEVCDSPContext *c, const int bit_depth)
             QPEL_LINKS(c->put_hevc_qpel, 1, 0, qpel_v,     10);
             QPEL_LINKS(c->put_hevc_qpel, 1, 1, qpel_hv,    10);
         }
-
-            }
-        }
     }
 }