Purpose: Document CEUSEDMUX, SRUSEDMUX muxes

Algorithm:

Results:

CEUSEDMUX: whether clock enable (CE) is used or clock always on 0: always on 1: controlled CLB.SLICE_X0.CEUSEDMUX 00_39 CLB.SLICE_X1.CEUSEDMUX <0 candidates>

SRUSEDMUX: whether FF can be reset or simply uses D value (How used when SR?) 0: never reset 1: controlled CLB.SLICE_X0.SRUSEDMUX 00_35 CLB.SLICE_X1.SRUSEDMUX <0 candidates>