drm/msm: add sde recovery dump data support

Support register dump when frame transfer fails. The dump file
contains sde hw registers and debug bus and vbif register data.
Client can read from the debugfs node to obtain the dump data.
Below entries are added on top of existing event log dump.

- /<debug fs>/dri/0/recovery_reg: sde hw registers dump
- /<debug fs>/dri/0/recovery_dbgbus: sde hw debug bus dump
- /<debug fs>/dri/0/recovery_vbif_dbgbus: sde vbif debug bus dump

Change-Id: I86a655d392da40a43d55e362d21c61502bbe7d0b
Signed-off-by: Abhijit Kulkarni <kabhijit@codeaurora.org>
Signed-off-by: Prabhanjan Kandula <pkandula@codeaurora.org>