i2c: i801: Document Intel DNV and Broxton

Add missing entries into i2c-i801 documentation and Kconfig about recently
added Intel DNV and Broxton.

Reported-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 0774f18..45e1a7e 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -124,6 +124,8 @@
 	    BayTrail (SOC)
 	    Sunrise Point-H (PCH)
 	    Sunrise Point-LP (PCH)
+	    DNV (SOC)
+	    Broxton (SOC)
 
 	  This driver can also be built as a module.  If so, the module
 	  will be called i2c-i801.