feat(msm8916): initialize CCI-400 for multiple clusters

The MSM8939 SoC is very similar to MSM8916 but uses an ARM CCI-400
for cache coherence between the two CPU clusters. Add the necessary
code to initialize it with the existing driver.

No functional change for platforms with a single cluster. The CCI
related code is discarded entirely in this case.

Change-Id: I041d60222d8d2aeca53b392934c87280c66b0db0
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
diff --git a/plat/qti/msm8916/msm8916_config.h b/plat/qti/msm8916/msm8916_config.h
index 992625b..977d02c 100644
--- a/plat/qti/msm8916/msm8916_config.h
+++ b/plat/qti/msm8916/msm8916_config.h
@@ -8,5 +8,6 @@
 #define MSM8916_CONFIG_H
 
 void msm8916_configure(void);
+void msm8916_configure_early(void);
 
 #endif /* MSM8916_CONFIG_H */