Unify programmer parameter extraction

Make programmer_param static by converting all users to extract_programmer_param.
Programmer parameters can no longer be separated with a
colon, they have to be separated with a comma.

Corresponding to flashrom svn r1072.

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/ft2232_spi.c b/ft2232_spi.c
index 0245c53..1dd2e0c 100644
--- a/ft2232_spi.c
+++ b/ft2232_spi.c
@@ -80,7 +80,7 @@
 	enum ftdi_interface ft2232_interface = INTERFACE_B;
 	char *arg;
 
-	arg = extract_param(&programmer_param, "type", ",:");
+	arg = extract_programmer_param("type");
 	if (arg) {
 		if (!strcasecmp(arg, "2232H"))
 			ft2232_type = FTDI_FT2232H;
@@ -93,7 +93,7 @@
 		}
 	}
 	free(arg);
-	arg = extract_param(&programmer_param, "port", ",:");
+	arg = extract_programmer_param("port");
 	if (arg) {
 		switch (toupper(*arg)) {
 		case 'A':