staging: comedi: 8253.h: rename i8253_cascade_ns_to_timer_2div()

All of the comedi drivers use the i8253_cascade_ns_to_timer macro
when calculating the divisors for the cascaded timers. This macro
just causes the i8253_cascade_ns_to_timer_2div() inline to be used.

Rename i8253_cascade_ns_to_timer_2div() and remove the macro.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/8253.h

@@ -30,8 +30,6 @@
 #define I8254_OSC_BASE_2MHZ		500
 #define I8254_OSC_BASE_1MHZ		1000
 
-#define i8253_cascade_ns_to_timer i8253_cascade_ns_to_timer_2div
-
 static inline void i8253_cascade_ns_to_timer_2div_old(int i8253_osc_base,
 						      unsigned int *d1,
 						      unsigned int *d2,
@@ -125,7 +123,7 @@ static inline void i8253_cascade_ns_to_timer_power(int i8253_osc_base,
 	*d2 = div2 & 0xffff;
 }
 
-static inline void i8253_cascade_ns_to_timer_2div(int i8253_osc_base,
+static inline void i8253_cascade_ns_to_timer(int i8253_osc_base,
 					     unsigned int *d1,
 					     unsigned int *d2,
 					     unsigned int *nanosec,