iommu: ipmmu-vmsa: avoid Wformat-security warning

iommu_device_sysfs_add() requires a constant format string, otherwise
a W=1 build produces a warning:

drivers/iommu/ipmmu-vmsa.c:1093:62: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
 1093 |         ret = iommu_device_sysfs_add(&mmu->iommu, &pdev->dev, NULL, dev_name(&pdev->dev));
      |                                                                     ^~~~~~~~~~~~~~~~~~~~
drivers/iommu/ipmmu-vmsa.c:1093:62: note: treat the string as an argument to avoid this
 1093 |         ret = iommu_device_sysfs_add(&mmu->iommu, &pdev->dev, NULL, dev_name(&pdev->dev));
      |                                                                     ^
      |                                                                     "%s",

This was an old bug but I saw it now because the code was changed as part
of commit d9d3ced ("iommu/ipmmu-vmsa: Register in a sensible order").

Fixes: 7af9a5f ("iommu/ipmmu-vmsa: Use iommu_device_sysfs_add()/remove()")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20250423164006.2661372-1-arnd@kernel.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>

Author: arndb

drivers/iommu/ipmmu-vmsa.c

@@ -1090,7 +1090,8 @@ static int ipmmu_probe(struct platform_device *pdev)
 	if (mmu->features->has_cache_leaf_nodes && ipmmu_is_root(mmu))
 		return 0;
 
-	ret = iommu_device_sysfs_add(&mmu->iommu, &pdev->dev, NULL, dev_name(&pdev->dev));
+	ret = iommu_device_sysfs_add(&mmu->iommu, &pdev->dev, NULL, "%s",
+				     dev_name(&pdev->dev));
 	if (ret)
 		return ret;