ghes_edac: enable HIP08 platform edac driver

[Borislav Petkov <bp@alien8.de>]

On Mon, May 14, 2018 at 12:11:28PM +0800, Zhengqiang wrote:
> In ARM64 defconfig, ghes_edac is default load. memory error report to
> user space rasdaemon tool through function ghes_edac_report_mem_error,
> we need it.

So depending on whether there will be an ARM64 edac driver, we can do
the platform whitelisting on x86 only if ARM prefers to do the reporting
through ghes_edac. James?

diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index 863fbf3db29f..7b298fd506e9 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -440,12 +440,14 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
 	struct mem_ctl_info *mci;
 	struct edac_mc_layer layers[1];
 	struct ghes_edac_dimm_fill dimm_fill;
-	int idx;
+	int idx = -1;
 
-	/* Check if safe to enable on this system */
-	idx = acpi_match_platform_list(plat_list);
-	if (!force_load && idx < 0)
-		return -ENODEV;
+	if (IS_ENABLED(CONFIG_X86)) {
+		/* Check if safe to enable on this system */
+		idx = acpi_match_platform_list(plat_list);
+		if (!force_load && idx < 0)
+			return -ENODEV;
+	}
 
 	/*
 	 * We have only one logical memory controller to which all DIMMs belong.