staging: kpc2000: kpc_spi: remove fifo_depth from kp_spi struct

The kp_spi structure contains a member 'fifo_depth'. This member is
never used. Therefore, it should be removed.
Signed-off-by: Geordan Neukum <gneukum1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/kpc2000/kpc2000_spi.c

@@ -105,7 +105,6 @@ struct kp_spi {
 	u64 __iomem        *base;
 	unsigned long       phys;
 	struct device      *dev;
-	int                 fifo_depth;
 	unsigned int        pin_dir:1;
 };