Revert "ARM: 7772/1: Fix missing flush_kernel_dcache_page() for noMMU"

This reverts commit 29ccf9ca53ade8a84fcba8ece1b3dc80c49c86d1.
Revert "Subject: ARM: 7755/1: handle user space mapped pages in flush_kernel_dcache_page"

This reverts commit abe17524cea7e209b40ba1ed4266a10b2f40ff92.
mm: memory_hotplug: no need to check res twice in add_memory

Remove one redundant check of res.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Amperific <amperific@gmail.com>