Config: Exynos5800: Enable build for Peach-Pi

This adds following things :
- New config and defconfig for Peach-Pi board.
- Alterations in Kconfig and MAINTAINERS.
- Addition of CONFIG_EXYNOS5800.
- ADdition of exynos5800-peach-pi in dts list.

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/include/configs/exynos5420-common.h b/include/configs/exynos5420-common.h
index b0f940c..03f941c 100644
--- a/include/configs/exynos5420-common.h
+++ b/include/configs/exynos5420-common.h
@@ -10,6 +10,8 @@
 #define __CONFIG_EXYNOS5420_H
 
 #define CONFIG_EXYNOS5420
+/* A variant of Exynos5420 (Exynos5 Family) */
+#define CONFIG_EXYNOS5800
 
 #define CONFIG_ENV_IS_IN_SPI_FLASH
 #define CONFIG_SPI_FLASH
@@ -38,7 +40,8 @@
 
 #define CONFIG_SPL_MAX_FOOTPRINT	(30 * 1024)
 
-#define CONFIG_DEVICE_TREE_LIST "exynos5420-peach-pit exynos5420-smdk5420"
+#define CONFIG_DEVICE_TREE_LIST "exynos5800-peach-pi"	\
+				"exynos5420-peach-pit exynos5420-smdk5420"
 
 #define CONFIG_MAX_I2C_NUM	11