f4d6da9554
The MPU is an implementation option available for both ARMv6-M and ARMv7-M. Remove poorly merged code that attempted to include this only for cortex m0+. Added doxygen, updated the definitions of the RBAR register, (though if you're really using this periperhal, you should be looking at the ref man for further information) Reported-by: forrestv on irc.