- TI documentation for msp430f1xx is ambiguous regarding length
of some memmory sectors. For some cpu's the acual size is 1/4 byte
smaller than advertised and one of the sectors is actually 256b and
not 512.
ref: https://e2e.ti.com/support/microcontrollers/msp430/f/166/p/798838/2962979#2962979
- Remove the first 256b sector from usage since there is not support for
variable sized pages
- Fix msp430f2617 FLASHPAGE_NUMOFF to represent accesible memory