msm-nand: Enable interleave mode based on modem build ID.

Add build id detection to enable the interleave mode feature in the driver.
In the interleave mode image ( boot, userdata etc ) codewords are written
to the NAND devices in a interleave fashion. Hence modem and apps should
operate in the same mode to read/write the images properly.

Change-Id: Ie9182eadd5750662dde07abfe793b4d231cf0ae1
Signed-off-by: Murali Nalajala <mnalajal@qualcomm.com>
(cherry picked from commit e80fa943d6aba79406c5793c84c5afa076a84e0c)

Conflicts:

	arch/arm/mach-msm/board-msm7x30.c
	arch/arm/mach-msm/devices-msm7x30.c
	drivers/mtd/devices/msm_nand.c