Commit 70838797 added support for clearing the homing state in
SET_KINEMATIC_POSITION commands. However, it can be difficult to use
that support as the default for SET_KINEMATIC_POSITION is to set all
axes as homed.
Add a new SET_HOMED parameter to allow one to explicitly request which
axes to consider in a homed state.
Also introduce a CLEAR_HOMED parameter and prefer that to the existing
CLEAR parameter.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
f3e89e25c5