V4L/DVB: xc5000: Fix a few warnings

drivers/media/common/tuners/xc5000.c: In function ‘xc_write_reg’:
drivers/media/common/tuners/xc5000.c:298: warning: passing argument 3 of ‘xc5000_readreg’ from incompatible pointer type
drivers/media/common/tuners/xc5000.c:235: note: expected ‘u16 *’ but argument is of type ‘u8 *’
drivers/media/common/tuners/xc5000.c: At top level:
drivers/media/common/tuners/xc5000.c:223: warning: ‘xc_read_i2c_data’ defined but not used

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/common/tuners/xc5000.c b/drivers/media/common/tuners/xc5000.c
index 215dad0..d2b2c12 100644
--- a/drivers/media/common/tuners/xc5000.c
+++ b/drivers/media/common/tuners/xc5000.c
@@ -217,6 +217,7 @@
 	return XC_RESULT_SUCCESS;
 }
 
+#if 0
 /* This routine is never used because the only time we read data from the
    i2c bus is when we read registers, and we want that to be an atomic i2c
    transaction in case we are on a multi-master bus */
@@ -231,6 +232,7 @@
 	}
 	return 0;
 }
+#endif
 
 static int xc5000_readreg(struct xc5000_priv *priv, u16 reg, u16 *val)
 {
@@ -295,7 +297,7 @@
 	if (result == XC_RESULT_SUCCESS) {
 		/* wait for busy flag to clear */
 		while ((WatchDogTimer > 0) && (result == XC_RESULT_SUCCESS)) {
-			result = xc5000_readreg(priv, XREG_BUSY, buf);
+			result = xc5000_readreg(priv, XREG_BUSY, (u16 *)buf);
 			if (result == XC_RESULT_SUCCESS) {
 				if ((buf[0] == 0) && (buf[1] == 0)) {
 					/* busy flag cleared */