arm:create SoC specific bsp directory and move code to there.

Created a new directory called bsp (board support package) to hold
board or system on chip specific code. The idea is the following.

Change-Id: Ica5886806940facae2fa5492fcc938b3c2b989be
arm:replace ifdef's by runtime checks in the lan8710a driver.

Change-Id: I1f345240b88362658e987a85f1642324471119c3
arm:replace ifdef's by runtime checks in the omap rtc driver.

Change-Id: I038f0fcf88061ae60d6d029d86c84153bf0f0020
arm-refactor:document ARM assembly code.

Change-Id: I8540a09cdaf45431ad163954ce41d36f4b72cad5