powerpc: convert makefiles to Kbuild style

Note:
arch/powerpc/cpu/mpc8260/Makefile is originally like follows:

    ---<snip>---
    START   = start.o kgdb.o
    COBJS   = traps.o serial_smc.o serial_scc.o cpu.o cpu_init.o speed.o \
    ---<snip>---
    COBJS-$(CONFIG_ETHER_ON_SCC) = ether_scc.o
    ---<snip>---
    $(LIB): $(OBJS)
            $(call cmd_link_o_target, $(OBJS) $(obj)kgdb.o)

The link rule `$(call cmd_link_o_target, $(OBJS) $(obj)kgdb.o)'
is weird.
kbdg.o is not included in $(OBJS) but linked into $(LIB)
and $(LIB) is not dependent on kgdb.o.
(Broken dependency tracking)

So,
    START   = start.o kgdb.o
shoud have been
    START   = start.o
    SOBJS   = kgdb.o

That is why this commit adds kgdb.o to obj-y, not to extra-y.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>

1 files changed, 18 insertions, 40 deletions

diff --git a/arch/powerpc/cpu/mpc8xx/Makefile b/arch/powerpc/cpu/mpc8xx/Makefile
index 71d5e302ca6..d40bdab1e14 100644
--- a/arch/powerpc/cpu/mpc8xx/Makefile
+++ b/arch/powerpc/cpu/mpc8xx/Makefile
@@ -5,45 +5,23 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
 # CFLAGS += -DET_DEBUG
 
-LIB	= $(obj)lib$(CPU).o
-
-SSTART-y += start.o
-CSTART-y += traps.o
-COBJS-y	+= bedbug_860.o
-COBJS-y	+= commproc.o
-COBJS-y	+= cpu.o
-COBJS-y	+= cpu_init.o
-COBJS-y	+= fec.o
-COBJS-$(CONFIG_OF_LIBFDT) += fdt.o
-COBJS-y	+= i2c.o
-COBJS-y	+= interrupts.o
-COBJS-y	+= scc.o
-COBJS-y	+= serial.o
-COBJS-y	+= speed.o
-COBJS-y	+= spi.o
-COBJS-y	+= upatch.o
-COBJS-y	+= video.o
-SOBJS-y	+= kgdb.o
-SOBJS-y	+= plprcr_write.o
-
-SRCS	:= $(SSTART-y:.o=.S) $(CSTART-y:.o=.c) $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-OBJS	:= $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
-START	:= $(addprefix $(obj),$(SSTART-y) $(CSTART-y))
-
-all:	$(obj).depend $(START) $(LIB)
-
-$(LIB):	$(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+extra-y += start.o
+extra-y += traps.o
+obj-y	+= bedbug_860.o
+obj-y	+= commproc.o
+obj-y	+= cpu.o
+obj-y	+= cpu_init.o
+obj-y	+= fec.o
+obj-$(CONFIG_OF_LIBFDT) += fdt.o
+obj-y	+= i2c.o
+obj-y	+= interrupts.o
+obj-y	+= scc.o
+obj-y	+= serial.o
+obj-y	+= speed.o
+obj-y	+= spi.o
+obj-y	+= upatch.o
+obj-y	+= video.o
+obj-y	+= kgdb.o
+obj-y	+= plprcr_write.o