[reggen] Interrupt Type to CFG doc
[reggen] Interrupt Type to CFG doc

This commit adds an interrupt type column to the interrupt section in
the IP technical specification.

Signed-off-by: Eli Kim <3ca62a2ad87376be2697209a1770e1afdbbba220@opentitan.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan