forked from Imagelibrary/rtems
- Add support to the BSP to enable irq-generic management - Update the powerpc shared irq code to support irq-generic. This is an opt in option for existing powerpc bsps. This change should be simpler now - Fix a number of issues in ISA IRQ controller handling by porting fixes from the i386 (PC) BSP Closes #4238 Closes #4239