ia64 and ppc64 have function descriptors.  Booting with initcall_debug will
print the descriptor address, not the address and name of the actual
function.  Another indirection is required.

Tested on ppc, ppc64 and ia64.
Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>