avcodec/x86/hevc_idct: fix function name in comment

Signed-off-by: Michael Niedermayer <[email protected]>

Author: michaelni

libavcodec/x86/hevc_idct.asm

@@ -111,7 +111,7 @@ cglobal hevc_idct8_dc_add_8, 2, 3, 0
 
 
 INIT_XMM sse2
-; void ff_hevc_idct16_dc_add_8_mmxext(uint8_t *dst, int16_t *coeffs, ptrdiff_t stride)
+; void ff_hevc_idct16_dc_add_8_sse2(uint8_t *dst, int16_t *coeffs, ptrdiff_t stride)
 cglobal hevc_idct16_dc_add_8, 3, 4, 6
     movsx             r3, word [r1]
     DC_ADD_INIT       r3, r2