ARM: rmobile: Add support salvator-x board

Salvator-x is an entry level development board based on
R-Car H3 SoC (R8A7795). This commit supports SCIF only.

Signed-off-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/board/renesas/salvator-x/Kconfig b/board/renesas/salvator-x/Kconfig
new file mode 100644
index 0000000..ed4c479
--- /dev/null
+++ b/board/renesas/salvator-x/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_SALVATOR_X
+
+config SYS_SOC
+	default "rmobile"
+
+config SYS_BOARD
+	default "salvator-x"
+
+config SYS_VENDOR
+	default "renesas"
+
+config SYS_CONFIG_NAME
+	default "salvator-x"
+
+endif