Play with kconfig a bit. Not ready for use yet.

nuttx/configs/px4fmu/Kconfig

@@ -0,0 +1,26 @@
+#
+# For a description of the syntax of this configuration file,
+# see misc/tools/kconfig-language.txt.
+#
+
+if ARCH_BOARD_PX4FMU
+config ARCH_LEDS
+	bool "NuttX LED support"
+	default n
+	---help---
+		"Support control of board LEDs by NuttX to indicate system state"
+
+config ARCH_BUTTONS
+	bool "Button support"
+	default n
+	---help---
+		"Support interfaces to use buttons provided by the board."
+
+config ARCH_IRQBUTTONS
+	bool "Button interrupt support"
+	default n
+	depends on ARCH_BUTTONS
+	---help---
+		"Support EXTI interrupts on button presses and releases."
+
+endif