Staging: comedi - correct parameter gainlkup for DAQCard-6024E in driver ni_mio_cs.c

Correct at least one of the incorrect specs for a national instrument
data acquisition card DAQCard-6024E. This card has only four different
gain settings (+-10V, +-5V, +-0.5V, +-0.05V).
Signed-off-by: Martin Homuth-Rosemann <homuth-rosemann@gmx.net>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/comedi/drivers/ni_mio_cs.c

@@ -123,7 +123,7 @@ static const struct ni_board_struct ni_boards[] = {
 	 .adbits = 12,
 	 .ai_fifo_depth = 1024,
 	 .alwaysdither = 0,
-	 .gainlkup = ai_gain_16,
+	 .gainlkup = ai_gain_4,
 	 .ai_speed = 5000,
 	 .n_aochan = 2,
 	 .aobits = 12,