soc: samsung: exynos-chipid: initialize later - with arch_initcall

The Exynos ChipID driver on Exynos SoCs has only informational
purpose - to expose the SoC device in sysfs.  No other drivers
depend on it so there is really no benefit of initializing it early.

Instead, initialize everything with arch_initcall which:
1. Allows to use dev_info() as the SoC bus is present (since
   core_initcall),
2. Could speed things up because of execution in a SMP environment
   (after bringing up secondary CPUs, unlike early_initcall),
3. Reduces the amount of work to be done early, when the kernel has to
   bring up critical devices.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20201202195955.128633-2-krzk@kernel.org

drivers/soc/samsung/exynos-chipid.c

@@ -99,9 +99,9 @@ static int __init exynos_chipid_early_init(void)
 		goto err;
 	}
 
-	/* it is too early to use dev_info() here (soc_dev is NULL) */
-	pr_info("soc soc0: Exynos: CPU[%s] PRO_ID[0x%x] REV[0x%x] Detected\n",
-		soc_dev_attr->soc_id, product_id, revision);
+	dev_info(soc_device_to_device(soc_dev),
+		 "Exynos: CPU[%s] PRO_ID[0x%x] REV[0x%x] Detected\n",
+		 soc_dev_attr->soc_id, product_id, revision);
 
 	return 0;
 
@@ -111,4 +111,4 @@ static int __init exynos_chipid_early_init(void)
 	return ret;
 }
 
-early_initcall(exynos_chipid_early_init);
+arch_initcall(exynos_chipid_early_init);