staging: comedi: ni_stc.h: simplify MSeries_AI_Config_Bank_Bits()

Simplify this helper function by using a bit-shift to set the high
banks select bit.
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/ni_stc.h

@@ -992,11 +992,7 @@ static inline unsigned MSeries_AI_Config_Channel_Bits(unsigned channel)
 
 static inline unsigned MSeries_AI_Config_Bank_Bits(unsigned channel)
 {
-	unsigned bits = channel & 0x30;
-
-	if (channel & 0x40)
-		bits |= 0x400;
-	return bits;
+	return ((channel & 0x40) << 4) | (channel & 0x30);
 }
 
 static inline unsigned MSeries_AI_Config_Gain_Bits(unsigned range)