mb/starlabs/labtop: Pull SSD Pin to low when entering S3

Pull GPP_D16 to low when suspending, otherwise it will remain active
and use power.

Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Change-Id: I2cbe7caf66e8d8c27414aca3b74416c2b8115ea1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62636
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/mainboard/starlabs/labtop/acpi/sleep.asl

@@ -2,6 +2,12 @@
 
 Method (MPTS, 1, NotSerialized)
 {
+#if CONFIG(BOARD_STARLABS_STARBOOK_TGL)
+	If (Arg0 == 0x03) {
+		\_SB.PCI0.CTXS (GPP_D16)
+	}
+#endif
+
 	RPTS (Arg0)
 }