Exynos5420: Introduce support for the Peach-Pit board

While the Exynos5420 chip is used in both Smdk5420 and in the Peach-Pit
line of devices, there could be other boards using the same chip, so a
common configuration file is being added (exynos5420.h) as well
as two common device tree files (exynos54xx.dtsi & exynos5420.dtsi).

The peach board as declared in boards.cfg is a copy of smdk5420
declaration. The configuration files are similar, but define different
default device trees, console serial ports and prompts.

The device tree files for smdk5420 and peach-pit inherit from the same
common file.

Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Signed-off-by: Akshay Saraswat <akshay.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/arch/arm/dts/exynos5420-smdk5420.dts b/arch/arm/dts/exynos5420-smdk5420.dts
index d739763..1bc6256 100644
--- a/arch/arm/dts/exynos5420-smdk5420.dts
+++ b/arch/arm/dts/exynos5420-smdk5420.dts
@@ -8,7 +8,7 @@
  */
 
 /dts-v1/;
-/include/ "exynos5420.dtsi"
+/include/ "exynos54xx.dtsi"
 
 / {
 	model = "SAMSUNG SMDK5420 board based on EXYNOS5420";
@@ -19,27 +19,6 @@
 	};
 
 	aliases {
-		i2c0 = "/i2c@12c60000";
-		i2c1 = "/i2c@12c70000";
-		i2c2 = "/i2c@12c80000";
-		i2c3 = "/i2c@12c90000";
-		i2c4 = "/i2c@12ca0000";
-		i2c5 = "/i2c@12cb0000";
-		i2c6 = "/i2c@12cc0000";
-		i2c7 = "/i2c@12cd0000";
-		i2c8 = "/i2c@12e00000";
-		i2c9 = "/i2c@12e10000";
-		i2c10 = "/i2c@12e20000";
-		spi0 = "/spi@12d20000";
-		spi1 = "/spi@12d30000";
-		spi2 = "/spi@12d40000";
-		spi3 = "/spi@131a0000";
-		spi4 = "/spi@131b0000";
-		mmc0 = "/mmc@12200000";
-		mmc1 = "/mmc@12210000";
-		mmc2 = "/mmc@12220000";
-		xhci0 = "/xhci@12000000";
-		xhci1 = "/xhci@12400000";
 		serial0 = "/serial@12C30000";
 		console = "/serial@12C30000";
 	};