galp6: Add support for new board

- Update submodules to support the new board
- Add board to list of supported models

Signed-off-by: Tim Crawford <tcrawford@system76.com>

models/galp6/edk2.config

@@ -0,0 +1,9 @@
+BOOTLOADER=COREBOOT
+DISABLE_SERIAL_TERMINAL=TRUE
+PLATFORM_BOOT_TIMEOUT=2
+PS2_KEYBOARD_ENABLE=TRUE
+#SECURE_BOOT_ENABLE=TRUE
+SERIAL_DRIVER_ENABLE=FALSE
+SHELL_TYPE=NONE
+TPM_ENABLE=TRUE
+#SYSTEM76_EC_LOGGING=TRUE