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/peach-pit.h b/include/configs/peach-pit.h
index 91bd37d..29a0996 100644
--- a/include/configs/peach-pit.h
+++ b/include/configs/peach-pit.h
@@ -23,8 +23,8 @@
 /* select serial console configuration */
 #define CONFIG_SERIAL3		/* use SERIAL 3 */
 
-#define CONFIG_SYS_PROMPT	"Peach # "
-#define CONFIG_IDENT_STRING	" for Peach"
+#define CONFIG_SYS_PROMPT	"Peach-Pit # "
+#define CONFIG_IDENT_STRING	" for Peach-Pit"
 
 #define CONFIG_VIDEO_PARADE