staging: comedi: comedi.h: Do not use BIT macro

The "comedi.h" file is part of the user API for COMEDI devices, and is
intended to be migrated to "include/uapi/linux".  The `BIT` macro from
"include/linux/bitops.h" should not be used there.

Replace the use of the `BIT` macro with hexadecimal constants of the
same value.  The `BIT` macro replaced expressions of the form `(1 << N)`
in this file originally, but reverting back to that form would encourage
patches changing them back to use the `BIT` macro.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/comedi.h

@@ -72,12 +72,12 @@
 #define CR_AREF(a)	(((a) >> 24) & 0x03)
 
 #define CR_FLAGS_MASK	0xfc000000
-#define CR_ALT_FILTER	BIT(26)
+#define CR_ALT_FILTER	0x04000000
 #define CR_DITHER	CR_ALT_FILTER
 #define CR_DEGLITCH	CR_ALT_FILTER
-#define CR_ALT_SOURCE	BIT(27)
-#define CR_EDGE		BIT(30)
-#define CR_INVERT	BIT(31)
+#define CR_ALT_SOURCE	0x08000000
+#define CR_EDGE		0x40000000
+#define CR_INVERT	0x80000000
 
 #define AREF_GROUND	0x00	/* analog ref = analog ground */
 #define AREF_COMMON	0x01	/* analog ref = analog common */
@@ -894,7 +894,7 @@ struct comedi_bufinfo {
 #define RANGE_LENGTH(b)		((b) & 0xffff)
 
 #define RF_UNIT(flags)		((flags) & 0xff)
-#define RF_EXTERNAL		BIT(8)
+#define RF_EXTERNAL		0x100
 
 #define UNIT_volt		0
 #define UNIT_mA			1