ifdtool: add "reserved" regions

This will let you at least dump / add these regions.

Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Change-Id: I195ba5e93823603e712cd16cecbb48141302bed6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46822
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>
diff --git a/util/ifdtool/ifdtool.c b/util/ifdtool/ifdtool.c
index 220c140..93f6f3f 100644
--- a/util/ifdtool/ifdtool.c
+++ b/util/ifdtool/ifdtool.c
@@ -1642,7 +1642,7 @@
 	       "   -V | --newvalue                       The new value to write into PCH strap specified by -S\n"
 	       "   -v | --version:                       print the version\n"
 	       "   -h | --help:                          print this help\n\n"
-	       "<region> is one of Descriptor, BIOS, ME, GbE, Platform\n"
+	       "<region> is one of Descriptor, BIOS, ME, GbE, Platform, res1, res2, res3\n"
 	       "\n");
 }
 
@@ -1732,6 +1732,12 @@
 				region_type = 3;
 			else if (!strcasecmp("Platform", region_type_string))
 				region_type = 4;
+			else if (!strcasecmp("res1", region_type_string))
+				region_type = 5;
+			else if (!strcasecmp("res2", region_type_string))
+				region_type = 6;
+			else if (!strcasecmp("res3", region_type_string))
+				region_type = 7;
 			else if (!strcasecmp("EC", region_type_string))
 				region_type = 8;
 			if (region_type == -1) {