ARM: Kirkwood: switch to DT clock providers

With true DT clock providers available switch Kirkwood clock setup in
DT- enabled boards. While AUXDATA can be removed completely from bus
probing, some devices still don't know about DT. Therefore, some clkdev
aliases are created until these devices also move to DT.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
diff --git a/arch/arm/mach-kirkwood/Kconfig b/arch/arm/mach-kirkwood/Kconfig
index 50bca50..2833492 100644
--- a/arch/arm/mach-kirkwood/Kconfig
+++ b/arch/arm/mach-kirkwood/Kconfig
@@ -46,6 +46,8 @@
 
 config ARCH_KIRKWOOD_DT
 	bool "Marvell Kirkwood Flattened Device Tree"
+	select MVEBU_CLK_CORE
+	select MVEBU_CLK_GATING
 	select USE_OF
 	help
 	  Say 'Y' here if you want your kernel to support the