V4L/DVB: Use custom I2C probing function mechanism

Now that i2c-core offers the possibility to provide custom probing
function for I2C devices, let's make use of it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 59a9f3c..c8627e4 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -294,6 +294,9 @@
 		      unsigned short const *addr_list,
 		      int (*probe)(struct i2c_adapter *, unsigned short addr));
 
+/* Common custom probe functions */
+extern int i2c_probe_func_quick_read(struct i2c_adapter *, unsigned short addr);
+
 /* For devices that use several addresses, use i2c_new_dummy() to make
  * client handles for the extra addresses.
  */