[ARM] 5531/1: Freescale STMP: get rid of HW_zzz macros [2/3]

Replace HW_zzz register access macros by regular __raw_readl/__raw_writel calls

Signed-off-by: dmitry pervushin <dpervushin@embeddedalley.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>