scsi: megaraid_sas: Move megasas_dbg_lvl init to megasas_init()

The megasas_dbg_lvl is a driver level parameter. Do not initialize it in
the probe path. Otherwise we will miss the debug print when binding a
new device to the megaraid driver.

Link: https://lore.kernel.org/r/[e-mail]
Acked-by: Sumit Saxena <[e-mail]>
Signed-off-by: Guixin Liu <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/megaraid/megaraid_sas_base.c

···
 	    (instance->pdev->device == PCI_DEVICE_ID_LSI_SAS0071SKINNY))
 		instance->flag_ieee = 1;
 
-	megasas_dbg_lvl = 0;
 	instance->flag = 0;
 	instance->unload = 1;
 	instance->last_time = 0;
···
 	 */
 	pr_info("megasas: %s\n", MEGASAS_VERSION);
 
+	megasas_dbg_lvl = 0;
 	support_poll_for_event = 2;
 	support_device_change = 1;
 	support_nvme_encapsulation = true;