boards: suppress dtc simple_bus_reg warning on LPC

LPC SoCs share the same register for all GPIO poarts. This leads us to a
device tree configuration that missmatches GPIO register address and
GPIO port identifier.

Signed-off-by: Andrei Gansari <[email protected]>

Author: agansari

boards/arm/lpcxpresso54114/pre_dt_board.cmake

@@ -0,0 +1,5 @@
+# Copyright (c) 2019, NXP
+# SPDX-License-Identifier: Apache-2.0
+
+# Suppress "simple_bus_reg" on LPC boards as all GPIO ports use the same register.
+list(APPEND EXTRA_DTC_FLAGS "-Wno-simple_bus_reg")

boards/arm/lpcxpresso55s69/pre_dt_board.cmake

@@ -0,0 +1,5 @@
+# Copyright (c) 2019, NXP
+# SPDX-License-Identifier: Apache-2.0
+
+# Suppress "simple_bus_reg" on LPC boards as all GPIO ports use the same register.
+list(APPEND EXTRA_DTC_FLAGS "-Wno-simple_bus_reg")