iwlegacy: use FH39_ prefix in 3945 code

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
diff --git a/drivers/net/wireless/iwlegacy/3945-mac.c b/drivers/net/wireless/iwlegacy/3945-mac.c
index 3c89999..ffd6ddf 100644
--- a/drivers/net/wireless/iwlegacy/3945-mac.c
+++ b/drivers/net/wireless/iwlegacy/3945-mac.c
@@ -1528,7 +1528,7 @@
 	if (inta & ~il->inta_mask) {
 		IL_WARN("Disabled INTA bits 0x%08x were pending\n",
 			 inta & ~il->inta_mask);
-		IL_WARN("   with FH_INT = 0x%08x\n", inta_fh);
+		IL_WARN("   with inta_fh = 0x%08x\n", inta_fh);
 	}
 
 	/* Re-enable all interrupts */