ARM: mvebu: Select corediv clk for all mvebu v7 SoC

Since the commit bd3677ff ("clk: mvebu: Remove corediv clock from
Armada XP"), the corediv clk is no more selected for Armada XP, however
this clock is used for Armada XP using the compatible
armada-370-corediv-clock.

While since commit 1594d568 ("clk: mvebu: Move corediv config to
mvebu config") Armada 38x and Armada 375 got corediv support again, not
only Armada XP was missed but also Armada 39x.

Actually all the SoC selecting MVEBU_V7 config need this clock:
git grep "\-corediv-clock" arch/arm/boot/dts
arch/arm/boot/dts/armada-370-xp.dtsi: compatible = "marvell,armada-370-corediv-clock";
arch/arm/boot/dts/armada-375.dtsi:    compatible = "marvell,armada-375-corediv-clock";
arch/arm/boot/dts/armada-38x.dtsi:    compatible = "marvell,armada-380-corediv-clock";
arch/arm/boot/dts/armada-39x.dtsi:    compatible = "marvell,armada-390-corediv-clock"

This commit now fixes this behavior by letting MVEBU_V7 select
MVEBU_CLK_COREDIV.

Fixes: bd3677ff ("clk: mvebu: Remove corediv clock from Armada XP")
Cc: stable@vger.kernel.org
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

arch/arm/mach-mvebu/Kconfig

@@ -23,6 +23,7 @@ config MACH_MVEBU_V7
 	select CACHE_L2X0
 	select ARM_CPU_SUSPEND
 	select MACH_MVEBU_ANY
+	select MVEBU_CLK_COREDIV
 
 config MACH_ARMADA_370
 	bool "Marvell Armada 370 boards"
@@ -32,7 +33,6 @@ config MACH_ARMADA_370
 	select CPU_PJ4B
 	select MACH_MVEBU_V7
 	select PINCTRL_ARMADA_370
-	select MVEBU_CLK_COREDIV
 	help
 	  Say 'Y' here if you want your kernel to support boards based
 	  on the Marvell Armada 370 SoC with device tree.
@@ -50,7 +50,6 @@ config MACH_ARMADA_375
 	select HAVE_SMP
 	select MACH_MVEBU_V7
 	select PINCTRL_ARMADA_375
-	select MVEBU_CLK_COREDIV
 	help
 	  Say 'Y' here if you want your kernel to support boards based
 	  on the Marvell Armada 375 SoC with device tree.
@@ -68,7 +67,6 @@ config MACH_ARMADA_38X
 	select HAVE_SMP
 	select MACH_MVEBU_V7
 	select PINCTRL_ARMADA_38X
-	select MVEBU_CLK_COREDIV
 	help
 	  Say 'Y' here if you want your kernel to support boards based
 	  on the Marvell Armada 380/385 SoC with device tree.