Fixed include/ppc440.c for UIC address Bug

Corrects bug affecting the addresses for the universal interrupt
controller UIC2 and UIC3 on the PPC440 Epx, GRx, and SPE chips.
Signed-off-by: NJeff Mann <mannj@embeddedplanet.com>
Signed-off-by: NStefan Roese <sr@denx.de>