util/intelp2m: Add support for Emmitsburg macro generation

Test: Generated GPIO for ASRock Rack SPC741D8-2L2T/BCM.

Change-Id: Ib7ded47fb1c0b87ebb3cecaf3e41319ac552b797
Signed-off-by: Fabian Meyer <fabian.meyer@student.kit.edu>
Co-authored-by: Yussuf Khalil <yussuf.khalil@kit.edu>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/82204
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Maxim <max.senia.poliak@gmail.com>

util/intelp2m/platforms/ebg/template.go

@@ -0,0 +1,27 @@
+package ebg
+
+import "review.coreboot.org/coreboot.git/util/intelp2m/platforms/common"
+
+type InheritanceTemplate interface {
+	GroupNameExtract(line string) (bool, string)
+	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 (platform PlatformSpecific) GroupNameExtract(line string) (bool, string) {
+	return common.KeywordsCheck(line,
+		"GPPC_A", "GPPC_B", "GPPC_S", "GPPC_C", "GPP_D", "GPP_E", "GPPC_H", "GPP_J",
+		"GPP_I", "GPP_L", "GPP_M", "GPP_N")
+}
+
+// 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 {
+	isIncluded, _ := common.KeywordsCheck(line, "GPP_", "GPPC_")
+	return isIncluded
+}