soc/amd/picasso/acpi: Change GPIO controller interrupt to shared

This change matches what we already do for cezanne. It will allow the
GPIO controller to work correctly in windows.

BUG=b:175146875
TEST=Boot windows and verify GPIO controller binds correctly and touch
screen works. Also boot linux and verify touchpad still works.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I998e286de18d3e3f8b2fe610d17aef94a6cf5477
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64227
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Rob Barnes <robbarnes@google.com>

src/soc/amd/picasso/acpi/sb_fch.asl

@@ -34,7 +34,7 @@ Device (GPIO)
 				ResourceConsumer,
 				Level,
 				ActiveLow,
-				Exclusive, , , IRQR)
+				Shared, , , IRQR)
 			{ 0 }
 			Memory32Fixed (ReadWrite, ACPIMMIO_GPIO0_BASE, 0x400)
 		}