hidpp20: use the internal list of features instead of asking the device
hidpp20: use the internal list of features instead of asking the device

We already know the indexes in the table, so there is no point in making
a round trip to the device.

Signed-off-by: Benjamin Tissoires <7a0e50e3f6a0939db82b6a8a423c08a163896f41@gmail.com>

whot/libratbag,cvuchener/libratbag,NoXPhasma/libratbag,libratbag/libratbag,libratbag/libratbag,NoXPhasma/libratbag,whot/libratbag,cvuchener/libratbag,whot/libratbag,NoXPhasma/libratbag,libratbag/libratbag,cvuchener/libratbag