ARM: dts: efm32: remove skeleton.dtsi include and fix unit address warnings

Removale of skeleton.dtsi allows us also to fix the following
warning from the dts compiler:
  Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name

by adding proper unit addresses to the memory nodes. Also add missing
device_type to the memory node while at it.
Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

arch/arm/boot/dts/efm32gg-dk3750.dts

@@ -16,7 +16,8 @@ chosen {
 		bootargs = "console=ttyefm4,115200 init=/linuxrc ignore_loglevel ihash_entries=64 dhash_entries=64 earlyprintk uclinux.physaddr=0x8c400000 root=/dev/mtdblock0";
 	};
 
-	memory {
+	memory@88000000 {
+		device_type = "memory";
 		reg = <0x88000000 0x400000>;
 	};
 
@@ -74,7 +75,7 @@ uart4: uart@4000e400 { /* UART1 */
 			status = "ok";
 		};
 
-		boardfpga: boardfpga {
+		boardfpga: boardfpga@80000000 {
 			compatible = "efm32board";
 			reg = <0x80000000 0x400>;
 			irq-gpios = <&gpio 64 1>;

arch/arm/boot/dts/efm32gg.dtsi

@@ -5,11 +5,13 @@
  * http://www.silabs.com/Support%20Documents/TechnicalDocs/EFM32GG-RM.pdf
  */
 
-#include "skeleton.dtsi"
 #include "armv7-m.dtsi"
 #include "dt-bindings/clock/efm32-cmu.h"
 
 / {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
 	aliases {
 		i2c0 = &i2c0;
 		i2c1 = &i2c1;