memblock: let memblock_type_name know about physmem type

memblock: let memblock_type_name know about physmem type

Since commit 70210ed950b5 ("mm/memblock: add physical memory list") the
memblock structure knows about a physical memory list.

memblock_type_name() should return "physmem" instead of "unknown" if the
name of the physmem memblock_type is being asked for.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Heiko Carstens <[email protected]>
Cc: Philipp Hachtmann <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>