kbuild: drop include2/ used for O=... builds

There is no longer any use of the include2/ directory.
The generated files has moved to include/generated.

Drop all references to said directory.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>

Makefile

@@ -335,7 +335,7 @@ CFLAGS_GCOV	= -fprofile-arcs -ftest-coverage
 # Use LINUXINCLUDE when you must reference the include/ directory.
 # Needed to be compatible with the O= option
 LINUXINCLUDE    := -I$(srctree)/arch/$(hdr-arch)/include -Iinclude \
-                   $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \
+                   $(if $(KBUILD_SRC), -I$(srctree)/include) \
                    -include include/linux/autoconf.h
 
 KBUILD_CPPFLAGS := -D__KERNEL__
@@ -954,7 +954,6 @@ PHONY += prepare archprepare prepare0 prepare1 prepare2 prepare3
 # prepare3 is used to check if we are building in a separate output directory,
 # and if so do:
 # 1) Check that make has not been executed in the kernel src $(srctree)
-# 2) Create the include2 directory, used for the second asm symlink
 prepare3: include/config/kernel.release
 ifneq ($(KBUILD_SRC),)
 	@$(kecho) '  Using $(srctree) as source for kernel'
@@ -963,10 +962,6 @@ ifneq ($(KBUILD_SRC),)
 		echo "  in the '$(srctree)' directory.";\
 		/bin/false; \
 	fi;
-	$(Q)if [ ! -d include2 ]; then                                  \
-	    mkdir -p include2;                                          \
-	    ln -fsn $(srctree)/include/asm-$(SRCARCH) include2/asm;     \
-	fi
 endif
 
 # prepare2 creates a makefile if using a separate output directory
@@ -1193,7 +1188,7 @@ CLEAN_FILES +=	vmlinux System.map \
                 .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map
 
 # Directories & files removed with 'make mrproper'
-MRPROPER_DIRS  += include/config include2 usr/include include/generated
+MRPROPER_DIRS  += include/config usr/include include/generated
 MRPROPER_FILES += .config .config.old include/asm .version .old_version \
                   include/linux/autoconf.h include/linux/version.h      \
                   include/linux/utsrelease.h                            \

arch/powerpc/platforms/cell/spufs/Makefile

@@ -13,10 +13,8 @@ SPU_CC		:= $(SPU_CROSS)gcc
 SPU_AS		:= $(SPU_CROSS)gcc
 SPU_LD		:= $(SPU_CROSS)ld
 SPU_OBJCOPY	:= $(SPU_CROSS)objcopy
-SPU_CFLAGS	:= -O2 -Wall -I$(srctree)/include \
-		   -I$(objtree)/include2 -D__KERNEL__
-SPU_AFLAGS	:= -c -D__ASSEMBLY__ -I$(srctree)/include \
-		   -I$(objtree)/include2 -D__KERNEL__
+SPU_CFLAGS	:= -O2 -Wall -I$(srctree)/include -D__KERNEL__
+SPU_AFLAGS	:= -c -D__ASSEMBLY__ -I$(srctree)/include -D__KERNEL__
 SPU_LDFLAGS	:= -N -Ttext=0x0
 
 $(obj)/switch.o: $(obj)/spu_save_dump.h $(obj)/spu_restore_dump.h