scsi: mpi3mr: Replace deprecated strncpy() with assignments

Really, there's no bug with the current code. Let's just ditch strncpy()
all together.

We can just copy the const strings instead of reserving room on the stack.

Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
Link: https://github.com/KSPP/linux/issues/90
Cc: linux-hardening@vger.kernel.org
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Justin Stitt <justinstitt@google.com>
Link: https://lore.kernel.org/r/20240305-strncpy-drivers-scsi-mpi3mr-mpi3mr_fw-c-v3-1-5b78a13ff984@google.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpi3mr/mpi3mr_fw.c

@@ -3676,7 +3676,7 @@ static const struct {
  * mpi3mr_print_ioc_info - Display controller information
  * @mrioc: Adapter instance reference
  *
- * Display controller personalit, capability, supported
+ * Display controller personality, capability, supported
  * protocols etc.
  *
  * Return: Nothing
@@ -3685,20 +3685,20 @@ static void
 mpi3mr_print_ioc_info(struct mpi3mr_ioc *mrioc)
 {
 	int i = 0, bytes_written = 0;
-	char personality[16];
+	const char *personality;
 	char protocol[50] = {0};
 	char capabilities[100] = {0};
 	struct mpi3mr_compimg_ver *fwver = &mrioc->facts.fw_ver;
 
 	switch (mrioc->facts.personality) {
 	case MPI3_IOCFACTS_FLAGS_PERSONALITY_EHBA:
-		strncpy(personality, "Enhanced HBA", sizeof(personality));
+		personality = "Enhanced HBA";
 		break;
 	case MPI3_IOCFACTS_FLAGS_PERSONALITY_RAID_DDR:
-		strncpy(personality, "RAID", sizeof(personality));
+		personality = "RAID";
 		break;
 	default:
-		strncpy(personality, "Unknown", sizeof(personality));
+		personality = "Unknown";
 		break;
 	}