ARM: imx_v6_v7_defconfig: Enable kexec support

Select CONFIG_KEXEC by default.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/configs/imx_v6_v7_defconfig

@@ -50,6 +50,7 @@ CONFIG_AEABI=y
 CONFIG_HIGHMEM=y
 CONFIG_CMA=y
 CONFIG_CMDLINE="noinitrd console=ttymxc0,115200"
+CONFIG_KEXEC=y
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
 CONFIG_ARM_IMX6Q_CPUFREQ=y