imx: move CONFIG_SYSCOUNTER_TIMER to Kconfig

Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
diff --git a/arch/arm/mach-imx/mx7/Kconfig b/arch/arm/mach-imx/mx7/Kconfig
index 4f8b4e1..2a3db86 100644
--- a/arch/arm/mach-imx/mx7/Kconfig
+++ b/arch/arm/mach-imx/mx7/Kconfig
@@ -3,6 +3,7 @@
 config MX7
 	bool
 	select ROM_UNIFIED_SECTIONS
+	select SYSCOUNTER_TIMER
 	select CPU_V7_HAS_VIRT
 	select CPU_V7_HAS_NONSEC
 	select ARCH_SUPPORT_PSCI