[PATCH] platform/x86: acer-wmi: Silence "unsupported" message a bit

[Benjamin Herrenschmidt]

This driver prints that "Unsupported machine..." message on every boot on
ThinkPad X1 Carbon laptops (and I assume a number of other systems), which
causes graphical boots to "glitch" a bit and is rather annoying ...

Make it a pr_debug instead.

Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
---

diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index 8952173dd380..7f7192e8fdab 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -2216,7 +2216,7 @@ static int __init acer_wmi_init(void)
        if (wmi_has_guid(AMW0_GUID1) &&
            !dmi_check_system(amw0_whitelist) &&
            quirks == &quirk_unknown) {
-               pr_err("Unsupported machine has AMW0_GUID1, unable to load\n");
+               pr_debug("Unsupported machine has AMW0_GUID1, unable to load\n");
                return -ENODEV;
        }