ARMv8: LS1043A: change macro CONFIG_ARMV8_PSCI definition

NXP/Freescale uses macro CONFIG_ARMV8_PSCI to enable their private PSCI
implementation in PPA firmware, but this macro naming too generic, so this
patch replaces it with a specic one CONFIG_FSL_PPA_ARMV8_PSCI.
And this macro CONFIG_ARMV8_PSCI will be used for a generic PSCI for ARMv8
which will be added in following patchs.

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/include/asm/armv8/sec_firmware.h b/arch/arm/include/asm/armv8/sec_firmware.h
index eb68185..a4e144b 100644
--- a/arch/arm/include/asm/armv8/sec_firmware.h
+++ b/arch/arm/include/asm/armv8/sec_firmware.h
@@ -14,7 +14,7 @@
 int sec_firmware_init(const void *, u32 *, u32 *);
 int _sec_firmware_entry(const void *, u32 *, u32 *);
 bool sec_firmware_is_valid(const void *);
-#ifdef CONFIG_ARMV8_PSCI
+#ifdef CONFIG_FSL_PPA_ARMV8_PSCI
 unsigned int sec_firmware_support_psci_version(void);
 unsigned int _sec_firmware_support_psci_version(void);
 #endif