Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
 
 P2020DS_36BIT_config \
 P2020DS_config:                unconfig
-       @mkdir -p $(obj)include
-       @if [ "$(findstring _36BIT_,$@)" ] ; then \
-               echo "#define CONFIG_PHYS_64BIT" >>$(obj)include/config.h ; \
-               $(XECHO) "... enabling 36-bit physical addressing." ; \
-       fi
-       @$(MKCONFIG) -a P2020DS ppc mpc85xx p2020ds freescale
+       @$(MKCONFIG) -t $(@:_config=) P2020DS ppc mpc85xx p2020ds freescale
 
 P1011RDB_config:       unconfig
        @mkdir -p $(obj)include
 
 #ifndef __CONFIG_H
 #define __CONFIG_H
 
+#ifdef CONFIG_MK_36BIT
+#define CONFIG_PHYS_64BIT
+#endif
+
 /* High Level Configuration Options */
 #define CONFIG_BOOKE           1       /* BOOKE */
 #define CONFIG_E500            1       /* BOOKE e500 family */