Use correct macro for board

app/CMakeLists.txt

@@ -1,4 +1,3 @@
-# Find Zephyr. This also loads Zephyr's build system.
 cmake_minimum_required(VERSION 3.13.1)
 
 set(CONFIG_APPLICATION_DEFINED_SYSCALL true)
@@ -15,6 +14,7 @@ list(APPEND SYSCALL_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/drivers/zephyr)
 
 include(cmake/zmk_config.cmake)
 
+# Find Zephyr. This also loads Zephyr's build system.
 find_package(Zephyr REQUIRED HINTS ../zephyr)
 project(zmk)
 

app/boards/arm/nrfmicro/pinmux.c

@@ -17,7 +17,7 @@ static int pinmux_nrfmicro_init(struct device *port)
 
 	struct device *p1 = device_get_binding("GPIO_1");
 
-#if defined(BOARD_NRFMICRO_13)
+#if CONFIG_BOARD_NRFMICRO_13
 	struct device *p0 = device_get_binding("GPIO_0");
 	// enable EXT_VCC (use 0 for nRFMicro 1.3, use 1 for nRFMicro 1.1)
 	gpio_pin_configure(p1, 9, GPIO_OUTPUT);
@@ -34,4 +34,4 @@ static int pinmux_nrfmicro_init(struct device *port)
 	return 0;
 }
 
-SYS_INIT(pinmux_nrfmicro_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);
+SYS_INIT(pinmux_nrfmicro_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);