ARM: PSCI: Add missing CONFIG_ARMV7_PSCI_NR_CPUS for PSCI enabled platforms

The original PSCI implementation assumed CONFIG_ARMV7_PSCI_NR_CPUS=4.
Add this to platforms that have not defined it, using CONFIG_MAX_CPUS if
it is defined, or the actual number of cores for the given platform.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
diff --git a/include/configs/ls1021atwr.h b/include/configs/ls1021atwr.h
index 0fb28ef..616aebb 100644
--- a/include/configs/ls1021atwr.h
+++ b/include/configs/ls1021atwr.h
@@ -10,6 +10,7 @@
 #define CONFIG_LS102XA
 
 #define CONFIG_ARMV7_PSCI
+#define CONFIG_ARMV7_PSCI_NR_CPUS	CONFIG_MAX_CPUS
 
 #define CONFIG_SYS_FSL_CLK