Various places in the flashrom source feature custom parameter extraction from programmer_param

This led to wildly differing syntax for programmer parameters, and
it also voids pretty much every assumption you could make about
programmer_param. The latter is a problem for libflashrom.

Use extract_param everywhere, clean up related code and make it more
foolproof. Add two instances of exit(1) where we have no option to
return an error. Remove six instances of exit(1) where returning an
error was possible.

WARNING: This changes programmer parameter syntax for a few programmers!

Corresponding to flashrom svn r1070.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Michael Karcher <flashrom@mkarcher.dialup.fu-berlin.de>
diff --git a/chipset_enable.c b/chipset_enable.c
index f743ccf..855cd2b 100644
--- a/chipset_enable.c
+++ b/chipset_enable.c
@@ -300,11 +300,8 @@
 	int max_decode_fwh_decode = 0;
 	int contiguous = 1;
 
-	if (programmer_param)
-		idsel = strstr(programmer_param, "fwh_idsel=");
-
-	if (idsel) {
-		idsel += strlen("fwh_idsel=");
+	idsel = extract_param(&programmer_param, "fwh_idsel", ",:");
+	if (idsel && strlen(idsel)) {
 		fwh_conf = (uint32_t)strtoul(idsel, NULL, 0);
 
 		/* FIXME: Need to undo this on shutdown. */
@@ -312,7 +309,15 @@
 		pci_write_long(dev, 0xd0, fwh_conf);
 		pci_write_word(dev, 0xd4, fwh_conf);
 		/* FIXME: Decode settings are not changed. */
+	} else if (idsel) {
+		msg_perr("Error: idsel= specified, but no number given.\n");
+		free(idsel);
+		/* FIXME: Return failure here once internal_init() starts
+		 * to care about the return value of the chipset enable.
+		 */
+		exit(1);
 	}
+	free(idsel);
 
 	/* Ignore all legacy ranges below 1 MB.
 	 * We currently only support flashing the chip which responds to