fix merge 3188 error

Change-Id: I6407dc263dbbfe630b6038310957a14823f13f91

modify ddr init code

add boot merger

update ddr init, fix maskrom io short,modify odt

rkuboot: fixed rk3168 chip name error.

rkuboot: makefile support rk3168.

RK3168:support rk3168 uboot

add ddr init code 20130517. support 3188A

change to RK310B.

set default config to 3188

modify 3188 config

modify 3188 merger tool config

modify uboot version

add init stack in lowlevel init, add reset cpu function

readd rk bin

move Tools to tools/rk_tools