staging: comedi: pcl818: fix PCL818_FI_DATAHI

The A/D FIFO uses two registers to get each analog data sample.
PCL818_FI_DATALO is the LSB of the data and PCL818_FI_DATAHI is
the MSB of the data. The current define for PCL818_FI_DATAHI is
incorrect and results in the LSB getting read twice.
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/pcl818.c

@@ -161,7 +161,7 @@ A word or two about DMA. Driver support DMA operations at two ways:
 #define PCL818_FI_STATUS 25
 /* R: one record from FIFO */
 #define PCL818_FI_DATALO 23
-#define PCL818_FI_DATAHI 23
+#define PCL818_FI_DATAHI 24
 
 /* type of interrupt handler */
 #define INT_TYPE_AI1_INT 1