ARM: mvebu: enable CPUFREQ_DT in mvebu_v7_defconfig

This patch enables the cpufreq-dt driver in mvebu_v7_defconfig, as it
is used on Armada XP platforms.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>

arch/arm/configs/mvebu_v7_defconfig

@@ -26,6 +26,7 @@ CONFIG_ZBOOT_ROM_BSS=0x0
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_CPU_FREQ=y
+CONFIG_CPUFREQ_DT=y
 CONFIG_CPU_IDLE=y
 CONFIG_ARM_MVEBU_V7_CPUIDLE=y
 CONFIG_VFP=y