f2fs: avoid selinux denial on CAP_SYS_RESOURCE

This fixes CAP_SYS_RESOURCE denial of selinux when using resgid, since it
seems selinux reports it at the first place, but mostly we don't need to
check this condition first.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/f2fs.h

@@ -1607,13 +1607,13 @@ static inline bool __allow_reserved_blocks(struct f2fs_sb_info *sbi,
 		return false;
 	if (IS_NOQUOTA(inode))
 		return true;
-	if (capable(CAP_SYS_RESOURCE))
-		return true;
 	if (uid_eq(sbi->s_resuid, current_fsuid()))
 		return true;
 	if (!gid_eq(sbi->s_resgid, GLOBAL_ROOT_GID) &&
 					in_group_p(sbi->s_resgid))
 		return true;
+	if (capable(CAP_SYS_RESOURCE))
+		return true;
 	return false;
 }