scopes: Add include/scope.inc.
scopes: Add include/scope.inc.

This is a copy of hantek_6022be.c, with device-specific code removed.

This includes some #defines at the top of the file, samplerates[],
and set_voltage().

uffejakobsen/sigrok-firmware-fx2lafw,uffejakobsen/sigrok-firmware-fx2lafw,swegener/sigrok-firmware-fx2lafw,swegener/sigrok-firmware-fx2lafw,uffejakobsen/sigrok-firmware-fx2lafw,swegener/sigrok-firmware-fx2lafw,swegener/sigrok-firmware-fx2lafw,uffejakobsen/sigrok-firmware-fx2lafw