ARM: vf610: Initial integration for Colibri VF50/VF61

This adds initial support for Colibri VF50/VF61 based on Freescale
Vybrid SoC.

- CPU clocked at 396/500 MHz
- DDR3 at 396MHz
  - for VF50, use PLL2 as memory clock (synchronous mode)
  - for VF61, use PLL1 as memory clock (asynchronous mode)
- Console on UART0 (Colibri UART_A)
- Ethernet on FEC1
- PLL5 based RMII clocking (E.g. No external crystal)
- UART_A and UART_C I/O muxing
- Boot from NAND by default

Tested on Colibri VF50/VF61 booting using serial loader over UART.

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
Acked-by: Stefan Agner <stefan@agner.ch>
diff --git a/board/toradex/colibri_vf/Kconfig b/board/toradex/colibri_vf/Kconfig
new file mode 100644
index 0000000..2c3cb30
--- /dev/null
+++ b/board/toradex/colibri_vf/Kconfig
@@ -0,0 +1,18 @@
+if TARGET_COLIBRI_VF
+
+config SYS_CPU
+	default "armv7"
+
+config SYS_BOARD
+	default "colibri_vf"
+
+config SYS_VENDOR
+	default "toradex"
+
+config SYS_SOC
+	default "vf610"
+
+config SYS_CONFIG_NAME
+	default "colibri_vf"
+
+endif