sysreset: implement MAX77663 sysreset functions

MAX77663 PMIC has embedded poweroff function used by some
device to initiane device power off. Implement it as sysreset
driver.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
diff --git a/drivers/sysreset/Kconfig b/drivers/sysreset/Kconfig
index eab556c..bc35896 100644
--- a/drivers/sysreset/Kconfig
+++ b/drivers/sysreset/Kconfig
@@ -74,6 +74,13 @@
 	  example on Microblaze where reset logic can be controlled via GPIO
 	  pin which triggers cpu reset.
 
+config SYSRESET_MAX77663
+	bool "Enable support for MAX77663 PMIC System Reset"
+	depends on DM_PMIC_MAX77663
+	select SYSRESET_CMD_POWEROFF if CMD_POWEROFF
+	help
+	  Enable system power management functions found in MAX77663 PMIC.
+
 config SYSRESET_MICROBLAZE
 	bool "Enable support for Microblaze soft reset"
 	depends on MICROBLAZE