soc/intel/common/acpi: drop return value for disabled PEPD function 2

PEPD function 2 is currently unused and disabled. Thus, drop the return
value, which matches the default return value.

Change-Id: Ia95b8b36fcb78e8976b66de15ec214a38c178cda
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47139
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/common/block/acpi/acpi/pep.asl

@@ -38,7 +38,6 @@ Device(PEPD)
 			 * Function 2 - Get Crash Dump Device
 			 */
 			If(Arg2 == PEPD_DSM_LPI_GET_CRASH_DUMP_DEV) {
-				Return(Buffer(One) {0x0})
 			}
 			/*
 			 * Function 3 - Display Off Notification