rockchip: rk3399: syscon: Add pmu support

Add pmu compatible with relevant U_BOOT_DRIVER for rk3399
via syscon rk3399 driver.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: YouMin Chen <cym@rock-chips.com>
Reviewed-by: Kever Yang <Kever.yang@rock-chips.com>
diff --git a/arch/arm/mach-rockchip/rk3399/syscon_rk3399.c b/arch/arm/mach-rockchip/rk3399/syscon_rk3399.c
index a8bb5b1..259ca44 100644
--- a/arch/arm/mach-rockchip/rk3399/syscon_rk3399.c
+++ b/arch/arm/mach-rockchip/rk3399/syscon_rk3399.c
@@ -13,6 +13,7 @@
 	{ .compatible = "rockchip,rk3399-pmugrf", .data = ROCKCHIP_SYSCON_PMUGRF },
 	{ .compatible = "rockchip,rk3399-pmusgrf", .data = ROCKCHIP_SYSCON_PMUSGRF },
 	{ .compatible = "rockchip,rk3399-cic", .data = ROCKCHIP_SYSCON_CIC },
+	{ .compatible = "rockchip,rk3399-pmu", .data = ROCKCHIP_SYSCON_PMU },
 	{ }
 };
 
@@ -58,4 +59,11 @@
 	.of_match = rk3399_syscon_ids + 3,
 	.bind = rk3399_syscon_bind_of_platdata,
 };
+
+U_BOOT_DRIVER(rockchip_rk3399_pmu) = {
+	.name = "rockchip_rk3399_pmu",
+	.id = UCLASS_SYSCON,
+	.of_match = rk3399_syscon_ids + 4,
+	.bind = rk3399_syscon_bind_of_platdata,
+};
 #endif