Fix 16K page size kernel config check

Non 16K kernels might have "CONFIG_ARM64_16K_PAGES is not set" string in
kernel config, properly handle this case.

Test: th
Bug: 293313353
Change-Id: I1a9582503c5fd20b8dcf95406166df7e11940424
diff --git a/core/Makefile b/core/Makefile
index 982e0c1..863e560 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1077,7 +1077,7 @@
 	mkdir -p $(TARGET_OUT_RAMDISK_16K)/lib/modules
 	KERNEL_RELEASE=`$(EXTRACT_KERNEL) --input $(BOARD_KERNEL_PATH_16K) --output-release /dev/stdout` ;\
 	IS_16K_KERNEL=`$(EXTRACT_KERNEL) --input $(BOARD_KERNEL_PATH_16K) --output-config /dev/stdout` ;\
-	if [[ "$$IS_16K_KERNEL" == *"CONFIG_ARM64_16K_PAGES"* ]]; then SUFFIX=_16k; fi ;\
+	if [[ "$$IS_16K_KERNEL" == *"CONFIG_ARM64_16K_PAGES=y"* ]]; then SUFFIX=_16k; fi ;\
 	cp -r $(RAMDISK_16K_STAGING_DIR)/lib/modules/0.0 $(TARGET_OUT_RAMDISK_16K)/lib/modules/$$KERNEL_RELEASE$$SUFFIX
 	$(MKBOOTFS) $(TARGET_OUT_RAMDISK_16K) | $(COMPRESSION_COMMAND) > $@