ARM: ts4800: add basic board support

This commit adds basic support including:
MMC, Serial console, TS4800 watchdog

The config use CONFIG_SKIP_LOWLEVEL_INIT as U-boot is used as a second
stage bootloader.

Signed-off-by: Lucile Quirion <lucile.quirion@savoirfairelinux.com>
signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ed8fd36..52ac9cc 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -667,6 +667,10 @@
 	bool "Support snowball"
 	select CPU_V7
 
+config TARGET_TS4800
+	bool "Support TS4800"
+	select CPU_V7
+
 config TARGET_U8500_HREF
 	bool "Support u8500_href"
 	select CPU_V7
@@ -991,6 +995,7 @@
 source "board/toradex/colibri_pxa270/Kconfig"
 source "board/toradex/colibri_vf/Kconfig"
 source "board/trizepsiv/Kconfig"
+source "board/technologic/ts4800/Kconfig"
 source "board/ttcontrol/vision2/Kconfig"
 source "board/udoo/Kconfig"
 source "board/vpac270/Kconfig"