msm: ADSPRPC: Changes to support 64 bit address space

Update the data types to handle 64 bit address space and
communicate 64 bit addresses to remote processor. Provide
compat ioctl call to allow for 32 bit user space to call
into the driver.

Change-Id: I954f07382bbc9998aed574a7bf74fab9299f0b45
Acked-by: Sathish Ambley <sambley@qti.qualcomm.com>
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>