amlogic: Fix prefixes in the helpers file

The code is the common directory is now generic, no need to have the SoC
prefix hardcoded in the function names.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Change-Id: Ied3a5e506b9abd4c2d6f893bafef50019bff24f1
diff --git a/plat/amlogic/common/include/aml_private.h b/plat/amlogic/common/include/aml_private.h
index 6f1855f..c06004f 100644
--- a/plat/amlogic/common/include/aml_private.h
+++ b/plat/amlogic/common/include/aml_private.h
@@ -11,7 +11,7 @@
 #include <stdint.h>
 
 /* Utility functions */
-unsigned int plat_gxbb_calc_core_pos(u_register_t mpidr);
+unsigned int plat_calc_core_pos(u_register_t mpidr);
 void gxbb_console_init(void);
 void gxbb_setup_page_tables(void);