ARM: Always build secure_cntvoff.S on ARM V7 to fix shmobile !SMP build

If CONFIG_SMP=n, building a kernel for R-Car Gen2 fails with:

    arch/arm/mach-shmobile/setup-rcar-gen2.o: In function `rcar_gen2_timer_init':
    setup-rcar-gen2.c:(.init.text+0x30): undefined reference to `secure_cntvoff_init'

Indeed, on R-Car Gen2 SoCs, secure_cntvoff_init() is not only needed for
secondary CPUs, but also for the boot CPU.  This is most visible on SoCs
with Cortex A7 cores (e.g. R-Car E2, cfr. commit 9ce3fa68 ("ARM:
shmobile: rcar-gen2: Add CA7 arch_timer initialization for r8a7794")),
but Cortex A15 is affected, too.

Fix this by always providing secure_cntvoff_init() when building for ARM
V7.
Reported-by: NArnd Bergmann <arnd@arndb.de>
Fixes: 7c607944 ("ARM: smp: Add initialization of CNTVOFF")
Fixes: cad160ed ("ARM: shmobile: Convert file to use cntvoff")
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: NMaxime Ripard <maxime.ripard@bootlin.com>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NOlof Johansson <olof@lixom.net>

arch/arm/common/Makefile

@@ -10,7 +10,7 @@ obj-$(CONFIG_DMABOUNCE)		+= dmabounce.o
 obj-$(CONFIG_SHARP_LOCOMO)	+= locomo.o
 obj-$(CONFIG_SHARP_PARAM)	+= sharpsl_param.o
 obj-$(CONFIG_SHARP_SCOOP)	+= scoop.o
-obj-$(CONFIG_SMP)		+= secure_cntvoff.o
+obj-$(CONFIG_CPU_V7)		+= secure_cntvoff.o
 obj-$(CONFIG_PCI_HOST_ITE8152)  += it8152.o
 obj-$(CONFIG_MCPM)		+= mcpm_head.o mcpm_entry.o mcpm_platsmp.o vlock.o
 CFLAGS_REMOVE_mcpm_entry.o	= -pg