Fix flashrom running on boards with coreboot

In r1577 we removed the discrimination of coreboot IDs and user-specified
mainboards. The problem is that the board enable code required to find
a board enable if either of these model strings were set. Therefore boards
running coreboot that do not need a board enable failed to execute flashrom
since then. This patch fixes this by handling coreboot IDs and user-supplied
IDs differently again.

Corresponding to flashrom svn r1605.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Idwer Vollering <vidwer@gmail.com>
diff --git a/board_enable.c b/board_enable.c
index 7f30180..28a8fcd 100644
--- a/board_enable.c
+++ b/board_enable.c
@@ -2499,7 +2499,6 @@
 	if (partmatch)
 		return partmatch;
 
-	msg_perr("No suitable board enable found for vendor=\"%s\", model=\"%s\".\n", vendor, model);
 	return NULL;
 }
 
@@ -2609,16 +2608,27 @@
 	board_handle_phase(P2);
 }
 
-int board_flash_enable(const char *vendor, const char *model)
+int board_flash_enable(const char *vendor, const char *model, const char *cb_vendor, const char *cb_model)
 {
 	const struct board_match *board = NULL;
 	int ret = 0;
 
-	if (vendor && model) {
+	if (vendor != NULL  && model != NULL) {
 		board = board_match_name(vendor, model);
-		if (!board) /* if a board was given it has to match, else we abort here. */
+		if (!board) { /* If a board was given by the user it has to match, else we abort here. */
+			msg_perr("No suitable board enable found for vendor=\"%s\", model=\"%s\".\n",
+				 vendor, model);
 			return 1;
-	} else {
+		}
+	}
+	if (board == NULL && cb_vendor != NULL && cb_model != NULL) {
+		board = board_match_name(cb_vendor, cb_model);
+		if (!board) { /* Failure is an option here, because many cb boards don't require an enable. */
+			msg_pdbg2("No board enable found matching coreboot IDs vendor=\"%s\", model=\"%s\".\n",
+				  cb_vendor, cb_model);
+		}
+	}
+	if (board == NULL) {
 		board = board_match_pci_ids(P3);
 		if (!board) /* i.e. there is just no board enable available for this board */
 			return 0;