kernel: handle optional backport for selinux_inode

* For supporting kernel 4.19 with 5.10 bpf backports.

Co-authored-by: rsuntk <rsuntk@yukiprjkt.my.id>

kernel/selinux/rules.c

@@ -37,7 +37,6 @@ static struct policydb *get_policydb(void)
 }
 
 static DEFINE_MUTEX(ksu_rules);
-
 void apply_kernelsu_rules(void)
 {
 	struct policydb *db;