Won't build (request_irq()/free_irq()), even if you manage to find an
s390 box with 8250-compatible UART they are expecting.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Acked-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>