fs: ubifs: Add support for ZSTD decompression

ZSTD can be a better tradeoff between NAND IO operations and decompression
speed giving a better boot time.

Signed-off-by: Piotr Wojtaszczyk <piotr.wojtaszczyk@timesys.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
2 files changed