board: arm: convert makefiles to Kbuild style

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Andreas Bießmann <andreas.devel@googlemail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Vipin Kumar <vipin.kumar@st.com>
Cc: Tom Warren <twarren@nvidia.com>
Cc: Tom Rini <trini@ti.com>
diff --git a/board/armltd/integrator/Makefile b/board/armltd/integrator/Makefile
index b86fbfb..7e5f6b0 100644
--- a/board/armltd/integrator/Makefile
+++ b/board/armltd/integrator/Makefile
@@ -9,28 +9,8 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
+obj-y	:= lowlevel_init.o
 
-LIB	= $(obj)lib$(BOARD).o
-
-SOBJS-y	:= lowlevel_init.o
-
-COBJS-y	:= integrator.o
-COBJS-$(CONFIG_PCI) += pci.o
-COBJS-y += timer.o
-
-SRCS	:= $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
-COBJS	:= $(addprefix $(obj),$(COBJS-y))
-SOBJS	:= $(addprefix $(obj),$(SOBJS-y))
-
-$(LIB):	$(obj).depend $(COBJS) $(SOBJS)
-	$(call cmd_link_o_target, $(COBJS) $(SOBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	+= integrator.o
+obj-$(CONFIG_PCI) += pci.o
+obj-y += timer.o
diff --git a/board/armltd/versatile/Makefile b/board/armltd/versatile/Makefile
index 89ae01f..a09a0ae 100644
--- a/board/armltd/versatile/Makefile
+++ b/board/armltd/versatile/Makefile
@@ -5,25 +5,5 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(BOARD).o
-
-COBJS	:= versatile.o
-SOBJS	:= lowlevel_init.o
-
-SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS))
-SOBJS	:= $(addprefix $(obj),$(SOBJS))
-
-$(LIB):	$(obj).depend $(OBJS) $(SOBJS)
-	$(call cmd_link_o_target, $(OBJS) $(SOBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= versatile.o
+obj-y	+= lowlevel_init.o
diff --git a/board/armltd/vexpress/Makefile b/board/armltd/vexpress/Makefile
index e7dc312..1dd6780 100644
--- a/board/armltd/vexpress/Makefile
+++ b/board/armltd/vexpress/Makefile
@@ -5,23 +5,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	= $(obj)lib$(BOARD).o
-
-COBJS	:= vexpress_common.o
-
-SRCS	:= $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS))
-
-$(LIB):	$(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################
+obj-y	:= vexpress_common.o