staging: comedi: mf6x4: remove unnecessary defines

The MF6X4_DAC_R macro defines the offsets for all the DAC registers.
Remove the unnecessary defines for each register.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
 drivers/staging/comedi/drivers/mf6x4.c | 22 +++++++++++-----------
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/mf6x4.c

@@ -48,15 +48,6 @@
 #define MF6X4_ADCTRL_R					0x00
 #define MF6X4_ADCTRL_M					0xff
 
-#define MF6X4_DA0_R					0x20
-#define MF6X4_DA1_R					0x22
-#define MF6X4_DA2_R					0x24
-#define MF6X4_DA3_R					0x26
-#define MF6X4_DA4_R					0x28
-#define MF6X4_DA5_R					0x2a
-#define MF6X4_DA6_R					0x2c
-#define MF6X4_DA7_R					0x2e
-/* Map DAC cahnnel id to real HW-dependent offset value */
 #define MF6X4_DAC_R(x)					(0x20 + ((x) * 2))
 
 /* BAR2 registers */