ACPI print OSI(Linux) warning only once

This message gets repeated on some machines:
https://bugzilla.kernel.org/show_bug.cgi?id=29292

Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 52ca964..3765980 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -155,7 +155,7 @@
 {
 	if (!strcmp("Linux", interface)) {
 
-		printk(KERN_NOTICE FW_BUG PREFIX
+		printk_once(KERN_NOTICE FW_BUG PREFIX
 			"BIOS _OSI(Linux) query %s%s\n",
 			osi_linux.enable ? "honored" : "ignored",
 			osi_linux.cmdline ? " via cmdline" :