ARM: dts: msm: Add IMEM address to android_usb for msmzirc

Added IMEM address that will be used by the USB driver to
store PID and Serial number(DLOAD cookie) to be passed
to boot chain.

Change-Id: I16d2fddd8c765522c4efacab5102b900780802cb
Signed-off-by: Mayank Rana <mrana@codeaurora.org>