Build ofw_cpu.c on all ARM configs using FDT. As we mve towards using the

Linux dts files these are more likely to have cpu nodes we can attach to.

Sponsored by:	ABT Systems Ltd

sys/arm/annapurna/alpine/files.alpine

@@ -5,7 +5,6 @@ kern/kern_clocksource.c				standard
 arm/versatile/sp804.c				standard
 arm/versatile/versatile_timer.c			standard
 dev/uart/uart_dev_ns8250.c			optional	uart
-dev/ofw/ofw_cpu.c				standard
 
 arm/annapurna/alpine/common.c			standard
 arm/annapurna/alpine/alpine_machdep.c		standard

sys/arm/broadcom/bcm2835/files.bcm283x

@@ -19,7 +19,6 @@ arm/broadcom/bcm2835/bcm283x_dwc_fdt.c		optional dwcotg fdt
 kern/kern_clocksource.c                         standard
 
 dev/mbox/mbox_if.m				standard
-dev/ofw/ofw_cpu.c				standard
 
 arm/broadcom/bcm2835/bcm2835_audio.c		optional sound vchiq \
 	compile-with "${NORMAL_C} -DUSE_VCHIQ_ARM -D__VCCOREVER__=0x04000000 -I$S/contrib/vchiq"

sys/arm/qemu/files.qemu

@@ -11,5 +11,3 @@ kern/kern_clocksource.c			standard
 arm/qemu/virt_common.c			standard
 arm/qemu/virt_machdep.c			standard
 arm/qemu/virt_mp.c			optional	smp
-
-dev/ofw/ofw_cpu.c			standard

sys/conf/files.arm

@@ -102,6 +102,7 @@ dev/fdt/fdt_arm_platform.c	optional	platform fdt
 dev/hwpmc/hwpmc_arm.c		optional	hwpmc
 dev/hwpmc/hwpmc_armv7.c		optional	hwpmc armv6
 dev/iicbus/twsi/twsi.c		optional	twsi
+dev/ofw/ofw_cpu.c		optional	fdt
 dev/psci/psci.c			optional	psci
 dev/psci/psci_arm.S		optional	psci
 dev/syscons/scgfbrndr.c		optional	sc