ARM: dts: oxnas: Fix clear-mask property

Disable all rps-irq interrupts during driver initialization to prevent
an accidental interrupt on GIC.

Fixes: 84316f4e ("ARM: boot: dts: Add Oxford Semiconductor OX810SE dtsi")
Fixes: 38d4a537

 ("ARM: dts: Add support for OX820 and Pogoplug V3")
Signed-off-by: Sungbo Eo <mans0n@gorani.run>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>