powerpc/mm: Drop the unnecessary region check

All the regions are now mapped with top nibble 0xc. Hence the region id
check is not needed for virt_addr_valid()

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V 2019-04-17 18:29:16 +05:30 • committed by Michael Ellerman
commit 53ed7a5947