USB: android: Enable cdrom lun creation from device tree

Allow lun information to be passed via DT and
create cdrom LUN if cdrom property is set.

A composition switch from default to mass_storage
based composition would create the LUNs but the
cdrom LUN cant be mounted because init script
only run once during the boot and hence there
is no place to detect LUN creation and mount
the cdrom media.

To overcome this issue, create LUN using previous
mechanism where LUN is created during the bootup
time itself.

CRs-Fixed: 594147
Change-Id: I7af82a93f15c530b6295f83e5385ccc181dfbade
Signed-off-by: Sujeet Kumar <ksujeet@codeaurora.org>