arm: dts: nrf: Add Device Tree Support for nRF51822 SoC & boards

Add device tree support for nRF51822 SoCs and Arduino 101-BLE,
Curie-BLE, BLE Nano, PCA10028-DK, and Quark-SE BLE boards. This
is minimal support for memory, flash, and UART.

Change-Id: I7e572bea537e384b6d66e520462f023ace0c9b35
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

arch/arm/soc/nordic_nrf5/nrf51/Kconfig.defconfig.nrf51822_QFAA

@@ -12,11 +12,13 @@ config SOC
 	string
 	default nRF51822_QFAA
 
+if !HAS_DTS
 config SRAM_SIZE
 	default 16
 
 config FLASH_SIZE
 	default 256
+endif
 
 config ISR_STACK_SIZE
 	default 640

arch/arm/soc/nordic_nrf5/nrf51/Kconfig.defconfig.nrf51822_QFAB

@@ -12,11 +12,13 @@ config SOC
 	string
 	default nRF51822_QFAB
 
+if !HAS_DTS
 config SRAM_SIZE
 	default 16
 
 config FLASH_SIZE
 	default 128
+endif
 
 config ISR_STACK_SIZE
 	default 640

arch/arm/soc/nordic_nrf5/nrf51/Kconfig.defconfig.nrf51822_QFAC

@@ -12,10 +12,12 @@ config SOC
 	string
 	default nRF51822_QFAC
 
+if !HAS_DTS
 config SRAM_SIZE
 	default 32
 
 config FLASH_SIZE
 	default 256
+endif
 
 endif # SOC_NRF51822_QFAC

arch/arm/soc/nordic_nrf5/nrf51/Kconfig.defconfig.series

@@ -19,19 +19,21 @@ config SYS_CLOCK_HW_CYCLES_PER_SEC
 config SYS_POWER_MANAGEMENT
 	default y
 
+if !HAS_DTS
 config SRAM_BASE_ADDRESS
 	default 0x20000000
 
 config FLASH_BASE_ADDRESS
 	default 0x00000000
 
-config NUM_IRQS
-	int
-	default 26
-
 config NUM_IRQ_PRIO_BITS
 	int
 	default 2
+endif
+
+config NUM_IRQS
+	int
+	default 26
 
 if SENSOR