ARM: pxa: add clock for static memory controller

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

diff --cc arch/arm/mach-pxa/clock-pxa3xx.c
Simple merge

diff --cc arch/arm/mach-pxa/clock.h
Simple merge

diff --cc arch/arm/mach-pxa/pxa3xx.c
Simple merge