[DRA7][CROSSBAR] Add IRQ crossbar dump and audit support

Add support for DRA7 IRQ crossbar configuration dump and audit support

MPU, DSP1,DSP2, IPU1, IPU2, EVE1, EVE2 configurations are currently
supported.

Following commands are now supported
omapconf dump crossbar <type> <module>
omapconf audit crossbar <type> <module>

Note about audit:
If 1 CROSS bar signal is mapped to 2 or more of module's signal, that
generates a 'CHECK' (if the signal is reserved) or a 'FAIL' if it
is a valid signal (example: UART interrupt on two GIC interrupt lines
due to a bad configuration)

Note about dump:

This shows the current snapshot of crossbar configuration, the crossbar
description is from the TRM (rev C DRI).

Acked-by: Austin Beam <austinbeam@ti.com>
Acked-by: Misael Lopez Cruz <misael.lopez@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Merge pull request #29 from nmenon/dra7-crossbar

[DRA7][CROSSBAR] Add IRQ crossbar dump and audit support