imx: imx8: Imply CPU_IMX by default

The imx8_cpu driver is a CPU Driver that supports the i.MX8Q
family. When it is enabled, it acts as an alternative to
arch/arm/mach-imx/cpu.c, but the imx8_cpu supports the driver
model where cpu.c does not.  Imply this newer driver by default.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/arch/arm/mach-imx/imx8/Kconfig b/arch/arm/mach-imx/imx8/Kconfig
index 9a43bed..257c14e 100644
--- a/arch/arm/mach-imx/imx8/Kconfig
+++ b/arch/arm/mach-imx/imx8/Kconfig
@@ -9,6 +9,8 @@
 config IMX8
 	bool
 	select HAS_CAAM
+	imply CPU
+	imply CPU_IMX
 
 config MU_BASE_SPL
 	hex "MU base address used in SPL"