util/intelp2m: Add support for Cannonlake-LP SoCs

Add support for Cannonlake-LP SoCs (Whiskeylake-U,
Coffeelake-U, Cometlake-U) as a separate parsing profile,
copying the existing 'Sunrise' profile and adjusting for differences
in reset mapping and GPIO macro generation

Test: convert inteltool GPIO log dump into coreboot macros for
an out-of-tree CML-U board.

Change-Id: I86296697ee892af7aa0818fb608b6d68fad2f307
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44457
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Maxim Polyakov <max.senia.poliak@gmail.com>

util/intelp2m/platforms/cnl/template.go

@@ -0,0 +1,33 @@
+package cnl
+
+import "strings"
+
+type InheritanceTemplate interface {
+
+	KeywordCheck(line string) bool
+}
+
+// GroupNameExtract - This function extracts the group ID, if it exists in a row
+// line      : string from the configuration file
+// return
+//     bool   : true if the string contains a group identifier
+//     string : group identifier
+func (PlatformSpecific) GroupNameExtract(line string) (bool, string) {
+	for _, groupKeyword := range []string{
+		"GPP_A", "GPP_B", "GPP_G",
+		"GPP_D", "GPP_F", "GPP_H",
+		"GPD",   "GPP_C", "GPP_E",
+	} {
+		if strings.Contains(line, groupKeyword) {
+			return true, groupKeyword
+		}
+	}
+	return false, ""
+}
+
+// KeywordCheck - This function is used to filter parsed lines of the configuration file and
+//                returns true if the keyword is contained in the line.
+// line      : string from the configuration file
+func (platform PlatformSpecific) KeywordCheck(line string) bool {
+	return platform.InheritanceTemplate.KeywordCheck(line)
+}