soong_config: Add BOARD_USES_MTK_HARDWARE

* Soong product variable 'Mtk_hardware'

Change-Id: I4801d1a6b6dc159d4c437be32d9906ef8d4add04
diff --git a/build/soong/android/variable.go b/build/soong/android/variable.go
index 2ff8da0..a2c7336 100644
--- a/build/soong/android/variable.go
+++ b/build/soong/android/variable.go
@@ -11,10 +11,15 @@
 	Needs_text_relocations struct {
 		Cppflags []string
 	}
+
+	Mtk_hardware struct {
+		Cflags []string
+	}
 }
 
 type ProductVariables struct {
 	Has_legacy_camera_hal1  *bool `json:",omitempty"`
 	Uses_media_extensions   *bool `json:",omitempty"`
 	Needs_text_relocations  *bool `json:",omitempty"`
+	Mtk_hardware            *bool `json:",omitempty"`
 }
diff --git a/build/soong/soong_config.mk b/build/soong/soong_config.mk
index 02aeeb5..1fa7063 100644
--- a/build/soong/soong_config.mk
+++ b/build/soong/soong_config.mk
@@ -5,4 +5,5 @@
 	echo '    "Has_legacy_camera_hal1": $(if $(filter true,$(TARGET_HAS_LEGACY_CAMERA_HAL1)),true,false),'; \
 	echo '    "Uses_media_extensions": $(if $(filter true,$(TARGET_USES_MEDIA_EXTENSIONS)),true,false),'; \
 	echo '    "Needs_text_relocations": $(if $(filter true,$(TARGET_NEEDS_PLATFORM_TEXT_RELOCATIONS)),true,false),'; \
+	echo '    "Mtk_hardware": $(if $(filter true,$(BOARD_USES_MTK_HARDWARE)),true,false),'; \
 	echo '') > $(SOONG_VARIABLES_TMP)