x86/hevc_mc: remove an unnecessary pxor

Signed-off-by: James Almer <jamrial@gmail.com>
Reviewed-by: Mickaël Raulet <mraulet@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/x86/hevc_mc.asm

@@ -551,8 +551,7 @@ cglobal hevc_put_hevc_pel_pixels%1_%2, 5, 5, 3, dst, dststride, src, srcstride,h
     LOOP_END         dst, dststride, src, srcstride
     RET
 
-cglobal hevc_put_hevc_uni_pel_pixels%1_%2, 5, 5, 3, dst, dststride, src, srcstride,height
-    pxor              m2, m2
+cglobal hevc_put_hevc_uni_pel_pixels%1_%2, 5, 5, 2, dst, dststride, src, srcstride,height
 .loop
     SIMPLE_LOAD       %1, %2, srcq, m0
     PEL_%2STORE%1   dstq, m0, m1