Add select PHYLIB to the UCC_GETH Kconfig option

ucc_geth has been migrated to use the common phylib code. So lets add a
'select PHYLIB' to the UCC_GETH Kconfig entry.

Signed-off-by: Jan Altenberg <jan.altenberg@linutronix.de>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>