ARM: pxa: irq: fix handling of ICMR registers in suspend/resume

[ Upstream commit 0c1049d ]

PXA3xx platforms have 56 interrupts that are stored in two ICMR
registers. The code in pxa_irq_suspend() and pxa_irq_resume() however
does a simple division by 32 which only leads to one register being
saved at suspend and restored at resume time. The NAND interrupt
setting, for instance, is lost.

Fix this by using DIV_ROUND_UP() instead.

Signed-off-by: Daniel Mack <[email protected]>
Signed-off-by: Robert Jarzmik <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>