spmi: pmic-arb: instantiate spmi_devices at arch_initcall

The spmi arbiter device spawns spmi_devices which in turn spawn
platform_devices for pmic peripherals.

Move the arbiter's driver init to arch_initcall so that the subsequent
devices it spawns get instantiated earlier.

Change-Id: Ib96937f274745549ee86f758673aab4db97acbaf
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 5ec3a59..a157af7 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -1051,7 +1051,12 @@
 		.of_match_table = spmi_pmic_arb_match_table,
 	},
 };
-module_platform_driver(spmi_pmic_arb_driver);
+
+int __init spmi_pmic_arb_init(void)
+{
+	return platform_driver_register(&spmi_pmic_arb_driver);
+}
+arch_initcall(spmi_pmic_arb_init);
 
 MODULE_LICENSE("GPL v2");
 MODULE_ALIAS("platform:spmi_pmic_arb");