pinctrl: baytrail: Clear interrupt triggering from pins that are in GPIO mode

pinctrl: baytrail: Clear interrupt triggering from pins that are in GPIO mode

commit 95f0972c7e4cbf3fc68160131c5ac2f033481d00 upstream.

If the pin is already configured as GPIO and it has any of the triggering
flags set, we may get spurious interrupts depending on the state of the
pin.

Prevent this by clearing the triggering flags on such pins. However, if the
pin is also configured as "direct IRQ" we leave the flags as is. Otherwise
it will prevent interrupts that are routed directly to IO-APIC.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[bwh: Backported to 3.16:
 - Add definition of BYT_DIRECT_IRQ_EN
 - Adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>