AVR: Added power-up reset hold (only works with rev A1). This should
help resolve any start-up reset glitches or sequencing issues.  See
official BBB wiki: revision A6A item #3, and rev A6 item #1.
http://elinux.org/Beagleboard:BeagleBoneBlack#Revision_A6
PowerCape AVR: Added watchdog functionality in 4 forms. Also added new
registers for future cape and platform identification.
AVR: Added configurable I2C address
AVR: Fix for potential double interrupts on 32kHz clock
INA219 util: Configurable I2C address and bus. Switch for outputting
whole numbers only - for scripts.
AVR: Update capability register
AVR: Fix for timer countdown bug and tweaked double-interrupt fix.