imx: imx9: Imply CPU_IMX by default

The imx8_cpu driver is a CPU Driver that supports the i.MX9
family to display the CPU type, temperature grade and
current operating temperature.  The older file,
arch/arm/mach-imx/cpu.c, does not support i.MX9, so this config
is enabled in various IMX9 boards.  Instead of having this option
enabled in every IMX9, select this driver by default for the
platform.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/arch/arm/mach-imx/imx9/Kconfig b/arch/arm/mach-imx/imx9/Kconfig
index c3e758e..1ccdb1c 100644
--- a/arch/arm/mach-imx/imx9/Kconfig
+++ b/arch/arm/mach-imx/imx9/Kconfig
@@ -8,6 +8,8 @@
 config IMX9
 	bool
 	select BINMAN
+	select CPU
+	select CPU_IMX
 	select HAS_CAAM
 	select ROM_UNIFIED_SECTIONS
 	imply IMX_TMU