scsi: mpi3mr: Use scnprintf() instead of snprintf()

I intended to move from snprintf() to scnprintf() in the previous patch but
I messed up and did not do that.  The result of my bug is that it this
function could trigger a WARN() if the buffer is too large.

Link: https://lore.kernel.org/r/20211013083005.GA8592@kili
Fixes: 76a4f7cc ("scsi: mpi3mr: Clean up mpi3mr_print_ioc_info()")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpi3mr/mpi3mr_fw.c

@@ -3045,7 +3045,7 @@ mpi3mr_print_ioc_info(struct mpi3mr_ioc *mrioc)
 	for (i = 0; i < ARRAY_SIZE(mpi3mr_protocols); i++) {
 		if (mrioc->facts.protocol_flags &
 		    mpi3mr_protocols[i].protocol) {
-			bytes_written += snprintf(protocol + bytes_written,
+			bytes_written += scnprintf(protocol + bytes_written,
 				    sizeof(protocol) - bytes_written, "%s%s",
 				    bytes_written ? "," : "",
 				    mpi3mr_protocols[i].name);
@@ -3056,7 +3056,7 @@ mpi3mr_print_ioc_info(struct mpi3mr_ioc *mrioc)
 	for (i = 0; i < ARRAY_SIZE(mpi3mr_capabilities); i++) {
 		if (mrioc->facts.protocol_flags &
 		    mpi3mr_capabilities[i].capability) {
-			bytes_written += snprintf(capabilities + bytes_written,
+			bytes_written += scnprintf(capabilities + bytes_written,
 				    sizeof(capabilities) - bytes_written, "%s%s",
 				    bytes_written ? "," : "",
 				    mpi3mr_capabilities[i].name);