net: remove dev_valid_name() check from __dev_alloc_name()

__dev_alloc_name() is only called by dev_prep_valid_name(),
which already checks that name is valid.
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20231023152346.3639749-6-kuba@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/core/dev.c

@@ -1077,9 +1077,6 @@ static int __dev_alloc_name(struct net *net, const char *name, char *res)
 	struct net_device *d;
 	char buf[IFNAMSIZ];
 
-	if (!dev_valid_name(name))
-		return -EINVAL;
-
 	/* Verify the string as this thing may have come from the user.
 	 * There must be one "%d" and no other "%" characters.
 	 */