kbuild: Fix CONFIG_FRAME_POINTER

It only makes sense to check CONFIG_FRAME_POINTER after including
.config, otherwise it'll always be unset ;)

Makefile

@@ -169,9 +169,6 @@ NOSTDINC_FLAGS  = -nostdinc -iwithprefix include
 CPPFLAGS	:= -D__KERNEL__ -Iinclude
 CFLAGS 		:= $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
 	  	   -fno-strict-aliasing -fno-common
-ifndef CONFIG_FRAME_POINTER
-CFLAGS		+= -fomit-frame-pointer
-endif
 AFLAGS		:= -D__ASSEMBLY__ $(CPPFLAGS)
 
 export	VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
@@ -260,6 +257,10 @@ ifdef CONFIG_MODULES
 export EXPORT_FLAGS := -DEXPORT_SYMTAB
 endif
 
+ifndef CONFIG_FRAME_POINTER
+CFLAGS		+= -fomit-frame-pointer
+endif
+
 #
 # INSTALL_PATH specifies where to place the updated kernel and system map
 # images.  Uncomment if you want to place them anywhere other than root.