Fix typo of PRODUCT_BUILD_ODM_IMAGE

Bug: 130879723
Test: treehugger
Change-Id: Ibe6523ca77aeb1ff6fdd138dcf2bfa46bcdeee59
diff --git a/core/board_config.mk b/core/board_config.mk
index e4b88cb..bdd7f7b 100644
--- a/core/board_config.mk
+++ b/core/board_config.mk
@@ -456,7 +456,7 @@
 endif
 
 BUILDING_ODM_IMAGE :=
-ifeq ($(ODM_BUILD_ODM_IMAGE),)
+ifeq ($(PRODUCT_BUILD_ODM_IMAGE),)
   ifdef BOARD_ODMIMAGE_FILE_SYSTEM_TYPE
     BUILDING_ODM_IMAGE := true
   endif