ARM: dts: msm: Add support for sharedmem device in apq8026_lw

Add support for sharedmem devices memory region for apq8026_lw.
APQ8026_LW has lower memory footprint due to which sharedmem
devices has different base address from parent chipset 8226.

This patch adds a new node that for apq8026_lw.

Change-Id: Ide7a371717813e5a41e5966c86e85d938b01cc25
Signed-off-by: Tirtha Kanti Ghosh <tirtha@codeaurora.org>