powerpc: mem_init should call memblock_is_reserved with phys_addr_t

This has been broken for a while but hasn't been an issue until
now because nobody was reserving regions at high addresses.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
1 file changed