FMComms6: Add plugin
plugins/fmcomms6: update

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
fmcomms6.glade: Add ADC calibration

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
plugins/fmcomms6.c: Bind calibration widgets to calibration attributes
plugins/fmcomms6.c: Update

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
plugins/fmcomms2.c: Fix DCXO spinbuttons not being always displayed
By enabling the "XO disable use EXT RefClk" option in FMComms2 Advanced plugin, the Coarse Tune and Fine tune spinbuttons are being hidden.
The bug causes the two spinbuttons to don't show up again when the option in the Advanced plugin is disabled.
Makefile: Create the "autostart" folder before copying any files inside

Signed-off-by: Dan Nechita <dan.nechita@analog.com>
oscplot.c: Add backwards compatibility for <matio-1.5.0

Signed-off-by: Dan Nechita <dan.nechita@analog.com>
plugins/motor_control.c: Add save/restore implementation for this plugin

Signed-off-by: Dan Nechita <dan.nechita@analog.com>