x86: ia32_signal: cleanup macro COPY

Impact: cleanup

No need to use temporary variable in this case.
Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/ia32/ia32_signal.c

@@ -198,9 +198,7 @@ struct rt_sigframe
 };
 
 #define COPY(x)			{		\
-	unsigned int reg;		\
-	err |= __get_user(reg, &sc->x);	\
-	regs->x = reg;			\
+	err |= __get_user(regs->x, &sc->x);	\
 }
 
 #define RELOAD_SEG(seg,mask)						\