staging: comedi: comedi_test: rename waveform members
staging: comedi: comedi_test: rename waveform members

Rename the members `struct waveform_private` associated with fake
waveform generation.  The affected members are `uvolt_amplitude` -->
`wf_amplitude` (the amplitude of the waveform), `usec_period` -->
`wf_period` (the period of the waveform), and `usec_current` -->
`wf_current` (the current time within a waveform period).

Signed-off-by: Ian Abbott <9e6ba6483b6a3e14d61f7c987e72ecb5b46122d6@mev.co.uk>
Reviewed-by: H Hartley Sweeten <382ff55d8e07d1082d179e669636cd1552da4f36@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs