net: strict_strtoul is obsolete, use kstrtoul instead

patch found using checkpatch.pl

Signed-off-by: Cosmin Stanescu <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/dns_resolver/dns_key.c

···
 				if (opt_vlen <= 0)
 					goto bad_option_value;
 
-				ret = strict_strtoul(eq, 10, &derrno);
+				ret = kstrtoul(eq, 10, &derrno);
 				if (ret < 0)
 					goto bad_option_value;