msm: ADSPRPC: Create debugfs file with process name

During device open create a debugfs file with name as the current
process name.

Change-Id: I7cb1c4a950b2498932f930eb79cb936952c0781d
Acked-by: Vishnu Karthik <vikarthi@qti.qualcomm.com>
Signed-off-by: Sathish Ambley <sathishambley@codeaurora.org>