spmi-pmic-arb: improve debug message on a bad irq request

Dump the stack-trace and the APID to PPID mapping when a client
issue a bad request.
Bad requests include: registering to an unmapped peripheral
interrupt, and attempting to map an already mapped APID.
The stack-trace dump helps in findind the offending caller.
The APID to PPID mapping-dump lists all the correct mapping
known to the driver. This mapping dump helps in understanding
why the client's request is bad.

Change-Id: Id0ce7064767b0406252c30ba93b916473b269b35
Signed-off-by: Gilad Avidov <gavidov@codeaurora.org>