pinctrl: amd: Cleanup header includes

Remove unused includes: no lists and mutexes.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>

Author: krzk

drivers/pinctrl/pinctrl-amd.c

@@ -21,11 +21,9 @@
 #include <linux/gpio/driver.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
-#include <linux/mutex.h>
 #include <linux/acpi.h>
 #include <linux/seq_file.h>
 #include <linux/interrupt.h>
-#include <linux/list.h>
 #include <linux/bitops.h>
 #include <linux/pinctrl/pinconf.h>
 #include <linux/pinctrl/pinconf-generic.h>