sh: Fix memcpy() build error on sh4eb.

A trivial bug breaking the build on sh4eb.
Signed-off-by: Nobuhiro Iwamatsu <hemamu@t-base.ne.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/lib/memcpy-sh4.S

@@ -727,7 +727,7 @@ ENTRY(memcpy)
 	mov.l	@(0x04,r5), r11	!  18 LS (latency=2)
 	xtrct	r9, r8		!  48 EX
 
-	mov.w	@(0x02,r5), r12	!  18 LS (latency=2)
+	mov.l   @(0x00,r5), r12 !  18 LS (latency=2)
     	xtrct	r10, r9		!  48 EX
 
 	movca.l	r0,@r1		!  40 LS (latency=3-7)