[ARM] 4840/1: pxa: fix the typo in get_irqnr_and_base

This typo causes the incorrect calculation of the IRQ numbers
in the ICIP2 registers.
Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/asm-arm/arch-pxa/entry-macro.S

@@ -35,7 +35,7 @@
 1004:
 		mrc	p6, 0, \irqstat, c6, c0, 0	@ ICIP2
 		mrc	p6, 0, \irqnr, c7, c0, 0	@ ICMR2
-		ands	\irqstat, \irqstat, \irqnr
+		ands	\irqnr, \irqstat, \irqnr
 		beq	1003f
 		rsb	\irqstat, \irqnr, #0
 		and	\irqstat, \irqstat, \irqnr