ratelimit: convert flags to int to save 8 bytes in size

ratelimit: convert flags to int to save 8 bytes in size

Only bit 1 is used, making an unsigned long a total overkill.

This brings it from 40 to 32 bytes, which in turn shrinks user_struct from
136 to 128 bytes.  Since the latter is allocated with hwalign, this means
the total usage goes down from 192 to 128 bytes per object.

No functional changes.

Link: https://lkml.kernel.org/r/20240817123754.240924-1-mjguzik@gmail.com
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>