arm/mach-keystone: remove legacy __cpuinit sections that crept in

We removed __cpuinit support (leaving no-op stubs) quite some time
ago.  However two crept back in as of commit 5eb3da72


("ARM: keystone: Switch over to coherent memory address space")

Since we want to clobber the stubs too, get these removed now.

Cc: Santosh Shilimkar <ssantosh@kernel.org>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>