scsi: mpt3sas: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix a couple
of warnings by explicitly adding break statements instead of just letting
the code fall through to the next case.

Link: https://github.com/KSPP/linux/issues/115
Link: https://lore.kernel.org/r/20210528200828.GA39349@embeddedor
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpt3sas/mpt3sas_base.c

@@ -4437,6 +4437,7 @@ _base_display_OEMs_branding(struct MPT3SAS_ADAPTER *ioc)
 				 ioc->pdev->subsystem_device);
 			break;
 		}
+		break;
 	default:
 		break;
 	}

drivers/scsi/mpt3sas/mpt3sas_scsih.c

@@ -12082,6 +12082,7 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 				ioc->multipath_on_hba = 1;
 			else
 				ioc->multipath_on_hba = 0;
+			break;
 		default:
 			break;
 		}