Fix MISRA rule 8.4 in common code

Rule 8.4: A compatible declaration shall be visible when
          an object or function with external linkage is defined.

Change-Id: I26e042cb251a6f9590afa1340fdac73e42f23979
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
diff --git a/include/bl1/bl1.h b/include/bl1/bl1.h
index b042100..41d436d 100644
--- a/include/bl1/bl1.h
+++ b/include/bl1/bl1.h
@@ -64,6 +64,26 @@
 #ifndef __ASSEMBLY__
 #include <cassert.h>
 
+struct entry_point_info;
+
+register_t bl1_smc_wrapper(uint32_t smc_fid,
+	void *cookie,
+	void *handle,
+	unsigned int flags);
+
+register_t bl1_smc_handler(unsigned int smc_fid,
+	register_t x1,
+	register_t x2,
+	register_t x3,
+	register_t x4,
+	void *cookie,
+	void *handle,
+	unsigned int flags);
+
+void bl1_print_next_bl_ep_info(const struct entry_point_info *bl_ep_info);
+
+void bl1_main(void);
+
 /*
  * Check if the total number of FWU SMC calls are as expected.
  */