Fix aux/flashfs to be compatible with the port/devflash.c
format instead of bitsy/devflash.c.

Since the Bitsy port is now deprecated (2013-01-30), there
is no longer need to keep the default behavior of aux/flashfs
compatible with it.

/sys/src/9/port/devflash.c
	On /dev/flash/partctl, the second word of the
	second line is the size of the partition

/sys/src/9/bitsy/devflash.c
	On /dev/flash/partctl, the second word of the
	second line is the end offset of the partition