i2c: pca-platform: fix broken email address

My Pengutronix address is not valid anymore, redirect people to the Pengutronix
kernel team.
Reported-by: Harald Geyer <harald@ccbib.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Robert Schwebel <r.schwebel@pengutronix.de>

drivers/i2c/busses/i2c-pca-platform.c

@@ -285,6 +285,6 @@ static struct platform_driver i2c_pca_pf_driver = {
 
 module_platform_driver(i2c_pca_pf_driver);
 
-MODULE_AUTHOR("Wolfram Sang <w.sang@pengutronix.de>");
+MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
 MODULE_DESCRIPTION("I2C-PCA9564/PCA9665 platform driver");
 MODULE_LICENSE("GPL");