blinky works on mellifera

boards/bh/mellifera_rev1/mellifera_rev1_defconfig

@@ -0,0 +1,15 @@
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_ARM_MPU=y
+CONFIG_HW_STACK_PROTECTION=y
+
+# Enable UART console on all configurations for convenience. This is usually
+# done at board level upstream so that all samples output printed messages to
+# the configured #zephyr,console. In production boards, this may be enabled at
+# application level or in a debug configuration overlay.
+CONFIG_SERIAL=y
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+CONFIG_PINCTRL=y