[PATCH] x86-64: fix arithmetic in comment

The xmm space on x86_64 is 256 bytes.
Signed-off-by: NAvi Kivity <avi@qumranet.com>
Signed-off-by: NAndi Kleen <ak@suse.de>

include/asm-x86_64/processor.h

@@ -181,7 +181,7 @@ struct i387_fxsave_struct {
 	u32	mxcsr;
 	u32	mxcsr_mask;
 	u32	st_space[32];	/* 8*16 bytes for each FP-reg = 128 bytes */
-	u32	xmm_space[64];	/* 16*16 bytes for each XMM-reg = 128 bytes */
+	u32	xmm_space[64];	/* 16*16 bytes for each XMM-reg = 256 bytes */
 	u32	padding[24];
 } __attribute__ ((aligned (16)));