nvmem: rockchip-efuse: Change initcall to subsys

We will add a avs driver to adjust opp's voltage according to leakage.
As it need register a notifier before cpufreq starts, and make cpufreq
defer probe is probably not really easy, so avs should probe earlier
than cpufreq, efuse should probe earlier than avs.

Change-Id: I817aa44c3b34d2fdf44148e6b9649ceed76d8f1f
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>

Author: finley1226

drivers/nvmem/rockchip-efuse.c

@@ -94,7 +94,7 @@ static const struct of_device_id rockchip_efuse_match[] = {
 };
 MODULE_DEVICE_TABLE(of, rockchip_efuse_match);
 
-static int rockchip_efuse_probe(struct platform_device *pdev)
+static int __init rockchip_efuse_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	struct nvmem_device *nvmem;
@@ -136,14 +136,20 @@ static int rockchip_efuse_remove(struct platform_device *pdev)
 }
 
 static struct platform_driver rockchip_efuse_driver = {
-	.probe = rockchip_efuse_probe,
 	.remove = rockchip_efuse_remove,
 	.driver = {
 		.name = "rockchip-efuse",
 		.of_match_table = rockchip_efuse_match,
 	},
 };
 
-module_platform_driver(rockchip_efuse_driver);
+static int __init rockchip_efuse_module_init(void)
+{
+	return platform_driver_probe(&rockchip_efuse_driver,
+				     rockchip_efuse_probe);
+}
+
+subsys_initcall(rockchip_efuse_module_init);
+
 MODULE_DESCRIPTION("rockchip_efuse driver");
 MODULE_LICENSE("GPL v2");