Introduce msg_*warn

Also, unify all outputs of "Warning:" and "Error:" to use normal
capitalization instead of mixing it with all capitals.

Corresponding to flashrom svn r1643.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Idwer Vollering <vidwer@gmail.com>
diff --git a/cbtable.c b/cbtable.c
index b859e68..e262a84 100644
--- a/cbtable.c
+++ b/cbtable.c
@@ -96,9 +96,9 @@
 	if (!strcasecmp(image_vendor, cb_vendor) && !strcasecmp(image_model, cb_model)) {
 		msg_pdbg2("This coreboot image matches this mainboard.\n");
 	} else {
-		msg_pinfo("WARNING: This coreboot image (%s:%s) does not appear to\n"
-			  "         be correct for the detected mainboard (%s:%s).\n",
-			  image_vendor, image_model, cb_vendor, cb_model);
+		msg_perr("This coreboot image (%s:%s) does not appear to\n"
+			 "be correct for the detected mainboard (%s:%s).\n",
+			 image_vendor, image_model, cb_vendor, cb_model);
 		return -1;
 	}