ARM: lpc18xx: add basic support for NXP LPC18xx/43xx SoCs

Add support for NXP's LPC18xx (Cortex-M3) and LPC43xx (Cortex-M4)
SoCs. These SoCs are NXP's high preformance MCU line and can run at
clock speeds up to 180 MHz for LPC18xx and 204 MHz for LPC43xx.

LPC43xx is more or less a LPC18xx with a Cortex-M4F core and a few
extra peripherals. The LPC43xx series also features one or two
Cortex-M0 cores that can be used to offload the main M4 core.

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 9954447..16b47af 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -586,6 +586,26 @@
 	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 
+config ARCH_LPC18XX
+	bool "NXP LPC18xx/LPC43xx"
+	depends on !MMU
+	select ARCH_HAS_RESET_CONTROLLER
+	select ARCH_REQUIRE_GPIOLIB
+	select ARM_AMBA
+	select ARM_NVIC
+	select AUTO_ZRELADDR
+	select CLKSRC_LPC32XX
+	select COMMON_CLK
+	select CPU_V7M
+	select GENERIC_CLOCKEVENTS
+	select NO_IOPORT_MAP
+	select PINCTRL
+	select SPARSE_IRQ
+	select USE_OF
+	help
+	  Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
+	  high performance microcontrollers.
+
 config ARCH_LPC32XX
 	bool "NXP LPC32XX"
 	select ARCH_REQUIRE_GPIOLIB