msm: camera: icp: Print lx7 status registers

If lx7 collapse/resume fails dump status registers to help
narrow down the cause. The change also adds a write barrier
post HOST2ICP trigger.

CRs-Fixed: 2841729
Change-Id: I8201a1c84e0455044fccf88cc86a865bb89356a7
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>

drivers/cam_icp/hfi.c

@@ -214,6 +214,9 @@ int hfi_write_cmd(void *cmd_ptr)
 	 */
 	wmb();
 	hfi_irq_raise(g_hfi);
+
+	/* Ensure HOST2ICP trigger is received by FW */
+	wmb();
 err:
 	mutex_unlock(&hfi_cmd_q_mutex);
 	return rc;