ADD: @marshmellows fixes for t55x7 reading signal.

ADD: @marshmellows fixes for t55x7 reading signal.
ADD: @marshmellows "diphase" definition for T55x7.
MOV: extracted the aquisition from the t55x7 methods and put them inside lfsampling.c
FIX: pcf7931 write,   there is 16bytes in a block.. not 4 as I thought before.
FIX: t55x7 lowered the WRITE_0 to 16.  Even bigger gap.