Pantheon: Add Board Support for Marvell dkb board

DKB is a Development Board for PANTHEON TD/TTC(pxa920/pxa910) with
* Processor upto 806Mhz
* LPDDR1/2
* x8/x16 SLC/MLC NAND
* Footprints for eMMC & MMC x8 card

With Peripherals:
* Parallel LCD I/F
* Audio codecs (88PM8607)
* MIPI CSI-2 camera
* Marvell 88W8787 802.11n/BT module
* Marvell 2G/3G RF
* Dual analog mics & speakers, headset jack, LED, ambient
* USB2.0 HS host, OTG (mini AB)
* GPIO, GPIO expander with DIP switches for easier selection
* UART serial over USB, CIR

This patch adds basic board support with DRAM and UART functionality

Signed-off-by: Lei Wen <leiwen@marvell.com>
Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
diff --git a/boards.cfg b/boards.cfg
index a64e478..45c3102 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -105,6 +105,7 @@
 magnesium                    arm         arm926ejs   imx27lite           logicpd        mx27
 omap5912osk                  arm         arm926ejs   -                   ti             omap
 edminiv2                     arm         arm926ejs   -                   LaCie          orion5x
+dkb			     arm         arm926ejs   -                   Marvell        pantheon
 ca9x4_ct_vxp                 arm         armv7       vexpress            armltd
 efikamx                      arm         armv7       efikamx             -              mx5
 mx51evk                      arm         armv7       mx51evk             freescale      mx5