[PATCH] move common timer and vector code for m68knommu/ColdFire/5307

This patch moves common ColdFire vector and timer procesing code from
the local per-processor config.c for the 5307 ColdFire sub-architecture.
All ColdFire CPU's have the same timer and basic vector setup, seems
crazy to repeat this code for each of 6 ColdFire CPU varients.
This patch also removes the reset button support, this is now moved to
a proper device driver, where it belongs.