msm: smem: Add support to read app data from SMEM.

Add smem interface to get data from shared memory.
One use case is getting config data for RBCPR driver.

Change-Id: I5fa089195ec05cb9d3859741e4f2224b0e89bc01
Signed-off-by: Kaushal Kumar <kaushalk@codeaurora.org>
2 files changed