ARM: at91: fix at91_sysirq_mask_rtc for sam9x5 SoCs

sam9x5 SoCs have the following errata:
 "RTC: Interrupt Mask Register cannot be used
  Interrupt Mask Register read always returns 0."

Hence we should not rely on what IMR claims about already masked IRQs
and just disable all IRQs.

Signed-off-by: Boris BREZILLON <[email protected]>
Reported-by: Bryan Evenson <[email protected]>
Reviewed-by: Johan Hovold <[email protected]>
Acked-by: Nicolas Ferre <[email protected]>
Cc: Bryan Evenson <[email protected]>
Cc: Andrew Victor <[email protected]>
Cc: Jean-Christophe Plagniol-Villard <[email protected]>
Cc: Alessandro Zummo <[email protected]>
Cc: Mark Roszko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions