soc/tegra: fuse: Update the SoC revision attribute to display a name

Currently the SoC revision attribute for Tegra devices displays the
value of the enum associated with a particular revision. This is not
very useful because to obtain the actual revision you need to
use the tegra_revision enumeration to translate the value.

It is more meaningful to display a name for the revision, such as
'A01', than the enumarated value and therefore, update the revision
attribute to display a name. This change does alter the ABI, which
is unfortunate, but this is more meaningful and maintable.

Signed-off-by: Jon Hunter <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

drivers/soc/tegra/fuse/fuse-tegra.c

···
 		return NULL;
 
 	attr->family = kasprintf(GFP_KERNEL, "Tegra");
-	attr->revision = kasprintf(GFP_KERNEL, "%d", tegra_sku_info.revision);
+	attr->revision = kasprintf(GFP_KERNEL, "%s",
+		tegra_revision_name[tegra_sku_info.revision]);
 	attr->soc_id = kasprintf(GFP_KERNEL, "%u", tegra_get_chip_id());
 	attr->custom_attr_group = fuse->soc->soc_attr_group;