zram: support deflate-specific params

Introduce support of algorithm specific parameters in algorithm_params
device attribute.  The expected format is algorithm.param=value.

For starters, add support for deflate.winbits parameter.

Link: https://lkml.kernel.org/r/20250514024825.1745489-3-senozhatsky@chromium.org


Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>