MAINTAINERS: Add maintainers for amd-pinctrl driver

Adding Basavaraj and myself to the maintainers list for amd-pinctrl
driver.

Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20210812115322.765379-1-Shyam-sundar.S-k@amd.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Shyam Sundar S K

MAINTAINERS

@@ -14617,6 +14617,12 @@ F:	Documentation/driver-api/pin-control.rst
 F:	drivers/pinctrl/
 F:	include/linux/pinctrl/
 
+PIN CONTROLLER - AMD
+M:	Basavaraj Natikar <Basavaraj.Natikar@amd.com>
+M:	Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
+S:	Maintained
+F:	drivers/pinctrl/pinctrl-amd.c
+
 PIN CONTROLLER - FREESCALE
 M:	Dong Aisheng <aisheng.dong@nxp.com>
 M:	Fabio Estevam <festevam@gmail.com>