kernel/resource.c: fix sign extension in reserve_setup()

kernel/resource.c: fix sign extension in reserve_setup()

When the 32-bit signed quantities get assigned to the u64 resource_size_t,
they are incorrectly sign-extended.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13253
Addresses http://bugzilla.kernel.org/show_bug.cgi?id=9905

Signed-off-by: Zhang Rui <[email protected]>
Reported-by: Leann Ogasawara <[email protected]>
Cc: Pierre Ossman <[email protected]>
Reported-by: <[email protected]>
Tested-by: <[email protected]>
Cc: <[email protected]>
Cc: Jesse Barnes <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>