Add board support for hawkboard

The patch adds basic board support for TI's OMAP-L138 based
Hawkboard. This board is pretty similar to the da850 EVM. Support for
nand and network access is added in this version.

The following bootup procedure is used.

At reset, the Rom Boot Loader(RBL), initialises the ddr and the nand
controllers and copies the second stage bootloader(nand_spl) to
RAM. The secondary bootloader then copies u-boot from a predefined
location in the nand flash to the RAM, and passes control to the
u-boot image.

Three config options are supported
* hawkboard_config - Used to create the u-boot.bin. Tftp the
 u-boot.bin image to the RAM from u-boot, and flash to the nand flash
 at address 0xe0000.

* hawkboard_nand_config - Used to generate the secondary
 bootloader(nand_spl) image. This creates an elf file u-boot-spl
 under nand_spl/. Create an AIS signed image using this file, and
 flash it to the nand flash at address 0x20000. The ais file should
 fit in one block.

* hawkboard_uart_config - This is same as the first image, but with
 the TEXT_BASE as expected by the RBL(0xc1080000). Create the AIS

Signed-off-by: Sughosh Ganu <urwithsughosh@gmail.com>
Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/boards.cfg b/boards.cfg
index 2209676..beb5d81 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -76,6 +76,9 @@
 pm9263                       arm         arm926ejs   -                   ronetix        at91
 da830evm                     arm         arm926ejs   da8xxevm            davinci        davinci
 da850evm                     arm         arm926ejs   da8xxevm            davinci        davinci
+hawkboard                    arm         arm926ejs   da8xxevm            davinci        davinci
+hawkboard_nand               arm         arm926ejs   da8xxevm            davinci        davinci     hawkboard:NAND_U_BOOT
+hawkboard_uart               arm         arm926ejs   da8xxevm            davinci        davinci     hawkboard:UART_U_BOOT
 davinci_dm355evm             arm         arm926ejs   dm355evm            davinci        davinci
 davinci_dm355leopard         arm         arm926ejs   dm355leopard        davinci        davinci
 davinci_dm365evm             arm         arm926ejs   dm365evm            davinci        davinci