MAINTAINERS: Add me as maintainer of Synopsys DesignWare I2C driver

I volunteered as maintainer of the DesignWare I2C driver, so update my
entry from reviewer to maintainer.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>

Author: westeri

MAINTAINERS

@@ -24479,8 +24479,8 @@ F:	Documentation/devicetree/bindings/media/snps,dw-hdmi-rx.yaml
 F:	drivers/media/platform/synopsys/hdmirx/*
 
 SYNOPSYS DESIGNWARE I2C DRIVER
+M:	Mika Westerberg <mika.westerberg@linux.intel.com>
 R:	Andy Shevchenko <andriy.shevchenko@linux.intel.com>
-R:	Mika Westerberg <mika.westerberg@linux.intel.com>
 R:	Jan Dabros <jsd@semihalf.com>
 L:	linux-i2c@vger.kernel.org
 S:	Supported