The (void *__iomem) cast is wrong.  Change the target type of the
"base" pointer to void __iomem instead and drop the cast.
Tested-by: NChristian Lamparter <chunkeey@googlemail.com>
Signed-off-by: NMans Rullgard <mans@mansr.com>
Signed-off-by: NTejun Heo <tj@kernel.org>