feat(cpufeat): do feature detection on secondary cores too

Feature detection currently only happens on the boot core, however, it
is possible to have asymmetry between cores. TF-A supports limited such
configurations so it should check secondary cores too.

Change-Id: Iee4955714685be9ae6a017af4a6c284e835ff299
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
diff --git a/include/common/feat_detect.h b/include/common/feat_detect.h
index 18e6c42..04e4c02 100644
--- a/include/common/feat_detect.h
+++ b/include/common/feat_detect.h
@@ -8,7 +8,7 @@
 #define FEAT_DETECT_H
 
 /* Function Prototypes */
-void detect_arch_features(void);
+void detect_arch_features(unsigned int core_pos);
 
 /* Macro Definitions */
 #define FEAT_STATE_DISABLED		0