drivers/staging/comedi/drivers/addi-data/hwdrv_apci3200.c: drop incorrect checks

Dropped some "< 0" and ">= 0" checks on unsigned int values.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=80501


Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Andrey Utkin <andrey.krieger.utkin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>