gfs2: Use get_random_u32 in gfs2_orlov_skip

Use get_random_u32() instead of get_random_bytes() to remove the last
remaining call to get_random_bytes().

Signed-off-by: Andreas Gruenbacher <[e-mail]>

fs/gfs2/rgrp.c

···
 static u32 gfs2_orlov_skip(const struct gfs2_inode *ip)
 {
 	const struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
-	u32 skip;
 
-	get_random_bytes(&skip, sizeof(skip));
-	return skip % sdp->sd_rgrps;
+	return get_random_u32() % sdp->sd_rgrps;
 }
 
 static bool gfs2_select_rgrp(struct gfs2_rgrpd **pos, const struct gfs2_rgrpd *begin)