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/pcidev.c b/pcidev.c
index 3153f15..4cb629d 100644
--- a/pcidev.c
+++ b/pcidev.c
@@ -78,10 +78,11 @@
 }
 
 uint32_t pcidev_init(uint16_t vendor_id, uint32_t bar,
-		     const struct pcidev_status *devs, char *pcidev_bdf)
+		     const struct pcidev_status *devs)
 {
 	struct pci_dev *dev;
 	struct pci_filter filter;
+	char *pcidev_bdf;
 	char *msg = NULL;
 	int found = 0;
 	uint32_t addr = 0, curaddr = 0;
@@ -93,12 +94,14 @@
 
 	/* Filter by vendor and also bb:dd.f (if supplied by the user). */
 	filter.vendor = vendor_id;
+	pcidev_bdf = extract_param(&programmer_param, "pci", ",");
 	if (pcidev_bdf != NULL) {
 		if ((msg = pci_filter_parse_slot(&filter, pcidev_bdf))) {
 			msg_perr("Error: %s\n", msg);
 			exit(1);
 		}
 	}
+	free(pcidev_bdf);
 
 	for (dev = pacc->devices; dev; dev = dev->next) {
 		if (pci_filter_match(&filter, dev)) {