ARMv8: Add secure sections for PSCI text and data

This patch adds secure_text, secure_data and secure_stack sections for ARMv8 to
hold PSCI text and data, and it is based on the legacy implementation of ARMv7.

ARMV8_SECURE_BASE defines the address for PSCI secure sections, ARMV8_PSCI and
ARMV8_PSCI_NR_CPUS are firstly used in this patch, so they are introduce here
in Kconfig too.

Signed-off-by: Hongbo Zhang <hongbo.zhang@nxp.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
index d28a422..cc0dc88 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
+++ b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -47,6 +47,7 @@
 menu "Layerscape PPA"
 config FSL_LS_PPA
 	bool "FSL Layerscape PPA firmware support"
+	depends on !ARMV8_PSCI
 	depends on ARCH_LS1043A || ARCH_LS1046A
 	select FSL_PPA_ARMV8_PSCI
 	help