rockchip: add px30-evb board

The px30 evb is an evaluation board for the px30 together with a dsi-
connected display. This adds board and config files for it.

Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/board/rockchip/evb_px30/Kconfig b/board/rockchip/evb_px30/Kconfig
new file mode 100644
index 0000000..0042c8e
--- /dev/null
+++ b/board/rockchip/evb_px30/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_EVB_PX30
+
+config SYS_BOARD
+	default "evb_px30"
+
+config SYS_VENDOR
+	default "rockchip"
+
+config SYS_CONFIG_NAME
+	default "evb_px30"
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+	def_bool y
+
+endif