Replace SSE2 instruction by SSE equivalent.

This is even potentially faster in this use-case.
Should fix AAC SBR decoding on machines with SSE but not
SSE2, fixing track issue #1041.
Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

libavcodec/x86/sbrdsp.asm

@@ -68,7 +68,7 @@ cglobal sbr_sum_square, 2, 3, 6
     shufps      m0, m0, 1
     addss       m0, m1
 %if ARCH_X86_64 == 0
-    movd        r0m,  m0
+    movss       r0m,  m0
     fld         dword r0m
 %endif
     RET