realtek: replace fix for spurious GPIO interrupts

realtek: replace fix for spurious GPIO interrupts

8 and 16 bit writes to the GPIO peripheral are apparently not supported,
and only worked most of the time. This resulted in garbabe writes to the
interrupt mask registers, causing spurious unhandled interrupts, which
could lead to CPU lock-ups as these kept retriggering.

Instead of clearing these spurious interrupt when they occur, the
upstream patch will just make sure all register writes have the intended
result, so these don't happen at all.

Signed-off-by: Sander Vanheule <sander@svanheule.net>