vc/google/chromeos/acpi: Add type to OIPG declaration

OIPG is a Package. Define the type so it doesn't default to UnknwonObj.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I068ed4ae95967aa884506c4971ee2e2dba7b5e4f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51537
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/vendorcode/google/chromeos/acpi/chromeos.asl

@@ -3,7 +3,7 @@
 #include <security/vboot/vbnv_layout.h>
 
 /* GPIO package generated at run time. */
-External (OIPG)
+External (OIPG, PkgObj)
 
 Device (CRHW)
 {