h264: change deblock_h_chroma_8_mmxext() to prevent valgrind confusion.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/x86/h264_deblock.asm

@@ -841,7 +841,11 @@ cglobal deblock_h_chroma_8_mmxext, 5,7
     TRANSPOSE4x8_LOAD  bw, wd, dq, PASS8ROWS(t5, r0, r1, t6)
     movq  buf0, m0
     movq  buf1, m3
-    call ff_chroma_inter_body_mmxext
+    LOAD_MASK  r2d, r3d
+    movd       m6, [r4] ; tc0
+    punpcklbw  m6, m6
+    pand       m7, m6
+    DEBLOCK_P0_Q0
     movq  m0, buf0
     movq  m3, buf1
     TRANSPOSE8x4B_STORE PASS8ROWS(t5, r0, r1, t6)