ACPI: Set the correct number of arguments in ACPI methods

These methods had unused arguments and could be corrected by
setting the correct number in the method initializer.

Change-Id: I86606cfa1c391e2221cee31994e83667fa9ead61
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/26125
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/drivers/intel/gma/acpi/common.asl

@@ -97,7 +97,7 @@
 	}
 
 	/* Device Set State */
-	Method(XDSS, 2)
+	Method(XDSS, 1)
 	{
 		/* If Parameter Arg0 is (1 << 31) | (1 << 30), the
 		 * display switch was completed

src/mainboard/getac/p470/acpi/ec.asl

@@ -547,7 +547,7 @@ Scope(\_SB)
 		}
 
 		/* Set DKD */
-		Method(SDKD, 1, Serialized)
+		Method(SDKD, 0, Serialized)
 		{
 			TRAP(0xda)
 			Return (0)