Use 'bool' type for 'bool' module parameters, if supported.

Use 'bool' type for 'bool' module parameters, if supported.

In the compatibility header for linux/moduleparam.h, define a
type COMEDI_MODULE_PARAM_BOOL_T to be used for 'bool' module parameters.

For kernel versions before 2.6.31, make it an 'int'.

For kernel versions 2.6.31 onwards, make it a 'bool'.  Support for bool
module parameters of type 'int' or 'unsigned int' is going away in
kernel version 3.4.  In kernel version 3.3 it produces a warning.

The only bool module parameter we currently have is 'comedi_autoconfig'.

Moved the #include "comedi_fops.h" after the #include
<linux/moduleparam.h> to get it to compile.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>