pinctrl: amd: Fix wakeups when IRQ is shared with SCI

pinctrl: amd: Fix wakeups when IRQ is shared with SCI

BugLink: https://bugs.launchpad.net/bugs/1953540
On some Lenovo AMD Gen2 platforms the IRQ for the SCI and pinctrl drivers
are shared.  Due to how the s2idle loop handling works, this case needs
an extra explicit check whether the interrupt was caused by SCI or by
the GPIO controller.

To fix this rework the existing IRQ handler function to function as a
checker and an IRQ handler depending on the calling arguments.

BugLink: https://gitlab.freedesktop.org/drm/amd/-/issues/1738
Reported-by: Joerie de Gram <j.de.gram@gmail.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Acked-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Link: https://lore.kernel.org/r/20211101014853.6177-2-mario.limonciello@amd.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
(cherry picked from commit 2d54067fcd23aae61e23508425ae5b29e973573d)
Signed-off-by: Alex Hung <alex.hung@canonical.com>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>