reiserfs: Remove unneed check in reiserfs_write_full_page()

Condition !A || A && B is equivalent to !A || B.

Generated by: scripts/coccinelle/misc/excluded_middle.cocci

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: YueHaibing <[e-mail]>
Signed-off-by: Jan Kara <[e-mail]>

fs/reiserfs/inode.c

···
 			clear_buffer_dirty(bh);
 			set_buffer_uptodate(bh);
 		} else if ((checked || buffer_dirty(bh)) &&
-		           (!buffer_mapped(bh) || (buffer_mapped(bh)
-						       && bh->b_blocknr ==
-						       0))) {
+			   (!buffer_mapped(bh) || bh->b_blocknr == 0)) {
 			/*
 			 * not mapped yet, or it points to a direct item, search
 			 * the btree for the mapping info, and log any direct