Interface: Remove the included header file in config_impl.h

The config_impl.h is meant to collect runtime features, the header file
psa_interface_redirect.h is unrelated, it should be included in
psa_config.h directly.

Change-Id: I47c8824f70889901fbc5ed150fc424b3e6e97320
Signed-off-by: Shawn Shan <Shawn.Shan@arm.com>
diff --git a/interface/include/psa_config.h b/interface/include/psa_config.h
index d215fba..1946e52 100644
--- a/interface/include/psa_config.h
+++ b/interface/include/psa_config.h
@@ -26,6 +26,7 @@
 
 /* SPE has specific configurations. */
 #include "config_impl.h"
+#include "psa_interface_redirect.h"
 
 #endif