msm: adsprpc: store process specific info in GETINFO ioctl call

Currently, process specific info like name and PID is being stored
in the internal data structures at the time of device open. But
since the DSP HAL service will now be opening the device node on
behalf of third-party applications, store process specific info in
GETINFO ioctl call which will be the first IOCTL call directly
from the client application.

Change-Id: If05d48123e4ec52c0271a7cb7f3ca790662d9abe
Acked-by: Thyagarajan Venkatanarayanan <venkatan@qti.qualcomm.com>
Signed-off-by: Edgar Flores <edgarf@codeaurora.org>
Signed-off-by: Himateja Reddy <hmreddy@codeaurora.org>