Input: bcm5974 - Drop the logical dimensions

Input: bcm5974 - Drop the logical dimensions

The logical scale was previously used to produce special width values
to userspace, and its only present use is to put "pressure" hysteresis
on a common scale. However, bcm5974 trackpads are very accurate and
work well without hysteresis.

This patch simplifies the driver and device data by removing the logical
scale altogether. While at it, the fake pressure range is replaced by the
orientation range, which will be used in a subsequent patch.

Tested-by: Benjamin Tissoires <benjamin.tissoires@enac.fr>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>