V4L/DVB (7651): tuner-xc2028: Several fixes to SCODE

This patch fixes several issues on SCODE:

1) The extracting tool weren't generating the proper tags for SCODE. This
   has almost no effect, since those tags shouldn't be used;

2) DIBCOM52 were using a wrong IF. It should be 5200, instead of 5700;

3) seek_firmware were wanting an exact match for firmware type. This is
   wrong. As result, no SCODE firmware were loaded;

4) A few files were including the wrong file for seeking demod firmwares;

5) XC3028_FE_DEFAULT can be used, if user doesn't want to load a firmware.
   However, this weren't documentated. This feature require more testing.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/tuner-xc2028.c b/drivers/media/video/tuner-xc2028.c
index 9dd688e..0e580bc 100644
--- a/drivers/media/video/tuner-xc2028.c
+++ b/drivers/media/video/tuner-xc2028.c
@@ -1,6 +1,6 @@
 /* tuner-xc2028
  *
- * Copyright (c) 2007 Mauro Carvalho Chehab (mchehab@infradead.org)
+ * Copyright (c) 2007-2008 Mauro Carvalho Chehab (mchehab@infradead.org)
  *
  * Copyright (c) 2007 Michel Ludwig (michel.ludwig@gmail.com)
  *       - frontend interface
@@ -404,7 +404,7 @@
 {
 	struct xc2028_data *priv = fe->tuner_priv;
 	int                 i, best_i = -1, best_nr_matches = 0;
-	unsigned int        ign_firm_type_mask = 0;
+	unsigned int        type_mask = 0;
 
 	tuner_dbg("%s called, want type=", __func__);
 	if (debug) {
@@ -421,18 +421,23 @@
 		*id = V4L2_STD_PAL;
 
 	if (type & BASE)
-		type &= BASE_TYPES;
+		type_mask = BASE_TYPES;
 	else if (type & SCODE) {
 		type &= SCODE_TYPES;
-		ign_firm_type_mask = HAS_IF;
+		type_mask = SCODE_TYPES & ~HAS_IF;
 	} else if (type & DTV_TYPES)
-		type &= DTV_TYPES;
+		type_mask = DTV_TYPES;
 	else if (type & STD_SPECIFIC_TYPES)
-		type &= STD_SPECIFIC_TYPES;
+		type_mask = STD_SPECIFIC_TYPES;
+
+	type &= type_mask;
+
+	if (!type & SCODE)
+		type_mask = ~0;
 
 	/* Seek for exact match */
 	for (i = 0; i < priv->firm_size; i++) {
-		if ((type == (priv->firm[i].type & ~ign_firm_type_mask)) &&
+		if ((type == (priv->firm[i].type & type_mask)) &&
 		    (*id == priv->firm[i].id))
 			goto found;
 	}
@@ -442,7 +447,7 @@
 		v4l2_std_id match_mask;
 		int nr_matches;
 
-		if (type != (priv->firm[i].type & ~ign_firm_type_mask))
+		if (type != (priv->firm[i].type & type_mask))
 			continue;
 
 		match_mask = *id & priv->firm[i].id;