ANDROID: zram: set comp_len to PAGE_SIZE when page is huge

This bug was introduced when two patches were applied out of order.

* zram: drop max_zpage_size and use zs_huge_class_size()
* zram: mark incompressible page as ZRAM_HUGE

Signed-off-by: Peter Kalauskas <peskal@google.com>
Bug: 119260394
Change-Id: I437d35c8d23c15237ad9c2d5bd7f99d7bff42872