arm: imx: imx8m: Enable GICv3 support if PSCI provider

In case U-Boot is a PSCI provider, enable GICv3 support as this
is necessary to bring up secondary cores.

Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/mach-imx/imx8m/Kconfig b/arch/arm/mach-imx/imx8m/Kconfig
index 64e6b49..6d35cda 100644
--- a/arch/arm/mach-imx/imx8m/Kconfig
+++ b/arch/arm/mach-imx/imx8m/Kconfig
@@ -2,6 +2,7 @@
 
 config IMX8M
 	bool
+	select GICV3 if ARMV8_PSCI
 	select HAS_CAAM
 	select ROM_UNIFIED_SECTIONS
 	select ARMV8_CRYPTO