kbuild: Remove O_TARGET from {kernel,mm,fs,...}/Makefile

It's gone almost everywhere else already, and will eventually make for
a nicer top-level Makefile.

fs/Makefile

@@ -5,8 +5,6 @@
 # Rewritten to use lists instead of if-statements.
 # 
 
-O_TARGET := fs.o
-
 export-objs :=	open.o dcache.o buffer.o bio.o inode.o dquot.o mpage.o aio.o \
                 fcntl.o
 

init/Makefile

@@ -2,8 +2,6 @@
 # Makefile for the linux kernel.
 #
 
-O_TARGET := init.o
-
 obj-y    := main.o version.o do_mounts.o
 
 include $(TOPDIR)/Rules.make

ipc/Makefile

 #
 # Makefile for the linux ipc.
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
-#
-# Note 2! The CFLAGS definition is now in the main makefile...
-
-O_TARGET := ipc.o
 
 obj-y   := util.o
 

kernel/Makefile

 #
 # Makefile for the linux kernel.
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
-#
-# Note 2! The CFLAGS definitions are now in the main makefile...
-
-O_TARGET := kernel.o
 
 export-objs = signal.o sys.o kmod.o context.o ksyms.o pm.o exec_domain.o \
 		printk.o platform.o suspend.o dma.o

mm/Makefile

 #
 # Makefile for the linux memory manager.
 #
-# Note! Dependencies are done automagically by 'make dep', which also
-# removes any old dependencies. DON'T put your own dependencies here
-# unless it's something special (ie not a .c file).
-#
-# Note 2! The CFLAGS definition is now in the main makefile...
-
-O_TARGET := mm.o
 
 export-objs := shmem.o filemap.o mempool.o page_alloc.o \
 		page-writeback.o

net/Makefile

@@ -5,9 +5,6 @@
 # Rewritten to use lists instead of if-statements.
 #
 
-O_TARGET :=	network.o
-
-
 export-objs :=	netsyms.o
 
 obj-y	:= socket.o core/

sound/Makefile

 # Makefile for the Linux sound card driver
 #
 
-O_TARGET := sound.o
-
 export-objs     := sound_core.o
 
 obj-$(CONFIG_SOUND) += soundcore.o