autoport: Remove '-' from Kconfig options

This won't compile since '-' is an operator in C.

Change-Id: Icf900c959cbcbd0b07cd83a1f6866bf255fdcf01
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/23321
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Christoph Pomaska <cp_public@posteo.de>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

util/autoport/main.go

@@ -147,6 +147,7 @@ func sanitize(inp string) string {
 	result := strings.ToLower(inp)
 	result = strings.Replace(result, " ", "_", -1)
 	result = strings.Replace(result, ",", "_", -1)
+	result = strings.Replace(result, "-", "_", -1)
 	for strings.HasSuffix(result, ".") {
 		result = result[0 : len(result)-1]
 	}