Update security/ktls-isa-l_crypto-kmod to work with KTLS RX API changes.

This doesn't enable ISA-L for KTLS RX, just fixes the module to compile
after the change to the "try" function's API.

Reviewed by: gallatin (maintainer)
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D25698