Implement %zu / %zd in printk

The SPI drivers from u-boot make heavy use of %zu/%zd (size_t/ssize_t).
Implement this in our printk implementation so we get useful output.

Change-Id: I91798ff4f28b9c3cd4db204c7ec503596d247dcd
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/1043
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
1 file changed