ARM: pxa: fix mixed declarations and code in sharpsl_pm

arch/arm/mach-pxa/sharpsl_pm.c: In function
'sharpsl_pm_pxa_read_max1111':
arch/arm/mach-pxa/sharpsl_pm.c:180: warning: ISO C90 forbids mixed
declarations and code

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>