[U-Boot] Porting U-boot

[hanumant <hanumant@codeaurora.org>]

I am trying to port u-boot to multiple soc/boards from an arm vendor.
I would appreciate any input on the following approach

1)The controller instance on various SOC are the same with minor 
differences in the fifo size, gpios, clocks.

2)In order to help the porting effort, my idea is to add soc/board 
neutral driver header files under the include/asm/ directory.
Possibly creating a vendor directory under there ie
arch/arm/include/asm/($vendor)/
(Different from the soc specific header files arch-$SOC)

3)Implement driver in respective driver category drivers/<$category>

4)Allow the SOC specific files to define the resources for specific 
peripherals based on the header files from 2)

Thanks