disp: msm: merge flag of register and dbgbus

Merge reg_dump and dbgbus dump flag into dump_mode, and bring
back debugfs node "evtlog_dump" to keep flexible controlling
of evtlog.
Set in_mem option as default dump mode, since in_coredump
option will be enabled once HW recovery feature is enabled.

Change-Id: I75de1a69b01594b652479bf79201591ac0bf62e5
Signed-off-by: Bruce Hoo <quic_bingchua@quicinc.com>

msm/sde/sde_connector.c

@@ -3419,6 +3419,7 @@ int sde_connector_register_custom_event(struct sde_kms *kms,
 		break;
 	case DRM_EVENT_SDE_HW_RECOVERY:
 		ret = _sde_conn_enable_hw_recovery(conn_drm);
+		sde_dbg_update_dump_mode(val);
 		break;
 	default:
 		break;