securemsm-kernel: Compile sec-module-symvers conditionally

Compile sec-module-symvers only if at least  one of the
ENABLE_SECUREMSM_QTEE_DLKM or ENABLE_SECUREMSM_DLKM is true.

Change-Id: Ibf69d19ef311d02862f8a87dabd01875ae2cdcab
Signed-off-by: Anmolpreet Kaur <[email protected]>

Android.mk

@@ -30,7 +30,9 @@ LOCAL_MODULE_DDK_BUILD := true
 KBUILD_OPTIONS := SSG_ROOT=$(SEC_KERNEL_DIR)
 KBUILD_OPTIONS += BOARD_PLATFORM=$(TARGET_BOARD_PLATFORM)
 
-###################################################
+CONDITIONAL_FLAGS := $(ENABLE_SECUREMSM_QTEE_DLKM) $(ENABLE_SECUREMSM_DLKM)
+
+ifneq (0, $(words $(filter true, $(CONDITIONAL_FLAGS))))
 include $(CLEAR_VARS)
 # For incremental compilation
 LOCAL_SRC_FILES           := $(SSG_SRC_FILES)
@@ -39,8 +41,7 @@ LOCAL_MODULE_STEM         := Module.symvers
 LOCAL_MODULE_KBUILD_NAME  := Module.symvers
 LOCAL_MODULE_PATH         := $(KERNEL_MODULES_OUT)
 include $(DLKM_DIR)/Build_external_kernelmodule.mk
-###################################################
-###################################################
+endif
 
 ifeq ($(ENABLE_SECUREMSM_QTEE_DLKM), true)
 include $(CLEAR_VARS)