erofs: simplify z_erofs_pcluster_readmore()

Get rid of unnecessary label `skip'. No logic changes.

Link: https://lore.kernel.org/r/20220529055425.226363-4-xiang@kernel.orgAcked-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>

fs/erofs/zdata.c

@@ -1436,22 +1436,19 @@ static void z_erofs_pcluster_readmore(struct z_erofs_decompress_frontend *f,
 		struct page *page;
 
 		page = erofs_grab_cache_page_nowait(inode->i_mapping, index);
-		if (!page)
-			goto skip;
-
+		if (page) {
 			if (PageUptodate(page)) {
 				unlock_page(page);
-			put_page(page);
-			goto skip;
-		}
-
+			} else {
 				err = z_erofs_do_read_page(f, page, pagepool);
 				if (err)
 					erofs_err(inode->i_sb,
 						  "readmore error at page %lu @ nid %llu",
 						  index, EROFS_I(inode)->nid);
+			}
 			put_page(page);
-skip:
+		}
+
 		if (cur < PAGE_SIZE)
 			break;
 		cur = (index << PAGE_SHIFT) - 1;