HARDENEDBSD: Add BEAGLEBONE-HARDENEDBSD kernel config

Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>
(cherry picked from commit c665558889b45c8729dd760eb20e733cdae4c5c2)
Signed-off-by: Shawn Webb <shawn.webb@hardenedbsd.org>