Explicitely enable shared interrupt 2 for any core that didn't get a dedicated IRQ
anymore (fallthrough case) and for EXTIF cores to make gpio interrupts work.
Also remove a bogus comment.
Signed-off-by: Jochen Friedrich <jochen@scram.de>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19895 3c298f89-4303-0410-b956-a3cf2f4a3e73
