staging: tidspbridge: change type to __iomem for per and core addresses

Currently per_pm_base and core_pm_base are declared as u32, however
_raw_* changed the data type, since:

195bbcac ARM: 7500/1: io: avoid writeback addressing modes for __raw_ accessors

This should fix warnings for per and core accesses:

warning: passing argument 2 of '__raw_writel' makes pointer from integer without a cast
../io.h:88: note: expected 'volatile void *' but argument is of type 'u32'

Signed-off-by: Omar Ramirez Luna <omar.ramirez@copitl.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>