staging: comedi: ni_mio_common: consolidate call to ni_mseries_get_pll_parameters()

All cases of the switch call ni_mseries_get_pll_parameters() with the same
parameters. Move the call out of the switch.

Also, move the printk from ni_mseries_get_pll_parameters() so that it can
be converted into a dev_err().

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>