mm/memblock.c: add debug output for memblock_add()

mm/memblock.c: add debug output for memblock_add()

memblock_reserve() calls memblock_reserve_region() which prints debugging
information if 'memblock=debug' was passed on the command line.  This
patch adds the same behaviour, but for memblock_add function().

[[email protected]: s/memblock_memory/memblock_add/ in message]
Signed-off-by: Alexander Kuleshov <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Philipp Hachtmann <[email protected]>
Cc: Fabian Frederick <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Emil Medve <[email protected]>
Cc: Akinobu Mita <[email protected]>
Cc: Tang Chen <[email protected]>
Cc: Tony Luck <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>