qed: qed_dev: Mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case, I replaced the code comments with
a proper "fall through" annotation, which is what GCC is expecting
to find.

Addresses-Coverity-ID: 114809 ("Missing break in switch")
Addresses-Coverity-ID: 114810 ("Missing break in switch")
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qed/qed_dev.c

@@ -1789,14 +1789,14 @@ int qed_hw_init(struct qed_dev *cdev, struct qed_hw_init_params *p_params)
 						p_hwfn->hw_info.hw_mode);
 			if (rc)
 				break;
-		/* Fall into */
+		/* Fall through */
 		case FW_MSG_CODE_DRV_LOAD_PORT:
 			rc = qed_hw_init_port(p_hwfn, p_hwfn->p_main_ptt,
 					      p_hwfn->hw_info.hw_mode);
 			if (rc)
 				break;
 
-		/* Fall into */
+		/* Fall through */
 		case FW_MSG_CODE_DRV_LOAD_FUNCTION:
 			rc = qed_hw_init_pf(p_hwfn, p_hwfn->p_main_ptt,
 					    p_params->p_tunn,