arm: use gen_isr_tables mechanism for interrupts This replaces the hard-coded vector table, as well as the software ISR table created by the linker. Now both are generated in build via script. Issue: ZEP-1038, ZEP-1165 Change-Id: Ie6faaf8f7ea3a7a25ecb542f6cf7740836ad7da3 Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>