MAINTAINERS: Add Shawn Lin as co-maintainer for dw_mmc drivers

Shawn offered to help with the Synposys Designware MMC/SD/SDIO drivers,
let's add him as a co-maintainer.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Shawn Lin <shawn.lin@rock-chips.com> > Signed-off-by: Ulf

Author: Ulf Hansson

MAINTAINERS

@@ -24930,6 +24930,7 @@ F:	include/linux/soc/amd/isp4_misc.h
 
 SYNOPSYS DESIGNWARE MMC/SD/SDIO DRIVER
 M:	Jaehoon Chung <jh80.chung@samsung.com>
+M:	Shawn Lin <shawn.lin@rock-chips.com>
 L:	linux-mmc@vger.kernel.org
 S:	Maintained
 F:	drivers/mmc/host/dw_mmc*