HID: thingm: thingm_fwinfo[] doesn't need to be global

No need to pollute global namespace by thingm_fwinfo[]. Make it static.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-thingm.c

@@ -31,7 +31,7 @@ struct thingm_fwinfo {
 	unsigned first;
 };
 
-const struct thingm_fwinfo thingm_fwinfo[] = {
+static const struct thingm_fwinfo thingm_fwinfo[] = {
 	{
 		.major = THINGM_MAJOR_MK1,
 		.numrgb = 1,