ARM: dts: msm: Add memshare for sm6150

Memshare driver allocates and share the memory with the modem
clients for their use. The device tree information for memshare
driver on sm6150 are added to specify client details.

Change-Id: I2160a90da92e9fc568c1fb5a5b8aeb0b3c90a1b5
Signed-off-by: Manoj Prabhu B <bmanoj@codeaurora.org>