Fixed invalid variable name in Flash.program_phrase().
Fixed invalid variable name in Flash.program_phrase().

A referenced argument was not updated when the argument name was changed
from 'flashPtr' to 'address'.

flit/pyOCD,mbedmicro/pyOCD,mbedmicro/pyOCD,flit/pyOCD,mesheven/pyOCD,pyocd/pyOCD,mesheven/pyOCD,pyocd/pyOCD,mbedmicro/pyOCD,mesheven/pyOCD