ChangeLog:

57616a19c joyeuse_defconfig: regenerate
91dc71493 zram: switch to 64-bit hash for dedup
7f0a0294d zram: use xxhash instead of jhash in dedup
9c30783fe xxhash: inline round() functions
ded2513e2 xxhash: replace copy_state() wrappers with macros
