staging: comedi: addi-data: remove the addi-data #include ifdef'ery

Move the addi-data specific #include's from addi_common.h to the
individual driver files.

The apci-1710, apci-3200, and apci-3300 drivers still have floating
point code in them and are currently disabled in the Kconfig and
Makefile. For now, move the fpu_{begin,end} functions from addi_common.c
to the main driver file so we can get rid of the #ifdef'ery.

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>