m68k/mac: Optimize interrupts using chain handlers

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --cc arch/m68k/mac/baboon.c
Simple merge

diff --cc arch/m68k/mac/oss.c
Simple merge

diff --cc arch/m68k/mac/psc.c
Simple merge

diff --cc arch/m68k/mac/via.c
Simple merge