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/Makefile b/drivers/sysreset/Makefile
index a9ac123..c31f51c 100644
--- a/drivers/sysreset/Makefile
+++ b/drivers/sysreset/Makefile
@@ -9,6 +9,7 @@
 obj-$(CONFIG_SANDBOX) += sysreset_sandbox.o
 obj-$(CONFIG_POWEROFF_GPIO) += poweroff_gpio.o
 obj-$(CONFIG_SYSRESET_GPIO) += sysreset_gpio.o
+obj-$(CONFIG_$(SPL_TPL_)SYSRESET_MAX77663) += sysreset_max77663.o
 obj-$(CONFIG_SYSRESET_MPC83XX) += sysreset_mpc83xx.o
 obj-$(CONFIG_SYSRESET_MICROBLAZE) += sysreset_microblaze.o
 obj-$(CONFIG_SYSRESET_OCTEON) += sysreset_octeon.o