msm:ADSPRPC: memory map updates to remote process

New version of interface for mapping and unmapping buffer
to remote process on DSP with additional mapping control flags.
All mappings of user allocated memory are tagged with file descriptor.

Change-Id: I2fb20df3f39476f92dbe0a6ec10e0b6065f90749
Acked-by: Viswanatham Paduchuri <vpaduchu@qti.qualcomm.com>
Signed-off-by: Himateja Reddy <hmreddy@codeaurora.org>