staging: comedi: cb_pcidas64: Fix checkpath warning

Fix checkpatch.pl warning:
Please use a blank line after function/struct/union/enum declarations

Move macro definition to the top of the file
Aligne macro definitions
Signed-off-by: Anson Jacob <ansonjacob.aj@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/cb_pcidas64.c

@@ -95,6 +95,7 @@
  */
 #define PRESCALED_TIMER_BASE	10000
 #define DMA_BUFFER_SIZE		0x1000
+#define DAC_FIFO_SIZE		0x2000
 
 /* maximum value that can be loaded into board's 24-bit counters */
 static const int max_counter_value = 0xffffff;
@@ -227,7 +228,6 @@ enum hw_config_contents {
 	DAC_FIFO_SIZE_MASK = 0xff00,	/* bits that set dac fifo size */
 	DAC_FIFO_BITS = 0xf800,		/* 8k sample ao fifo */
 };
-#define DAC_FIFO_SIZE 0x2000
 
 enum daq_atrig_low_4020_contents {
 	/* use trig/ext clk bnc input for analog gate signal */