Remove extern keyword from function declarations

Function declarations implicitly have external linkage so do not
need the extern keyword.

Change-Id: Ia0549786796d8bf5956487e8996450a0b3d79f32
diff --git a/include/bl31/context_mgmt.h b/include/bl31/context_mgmt.h
index ad9d785..ce4f7a8 100644
--- a/include/bl31/context_mgmt.h
+++ b/include/bl31/context_mgmt.h
@@ -36,24 +36,24 @@
 /*******************************************************************************
  * Function & variable prototypes
  ******************************************************************************/
-extern void cm_init(void);
-extern void *cm_get_context(uint64_t mpidr, uint32_t security_state);
-extern void cm_set_context(uint64_t mpidr,
-			   void *context,
-			   uint32_t security_state);
-extern void cm_el3_sysregs_context_save(uint32_t security_state);
-extern void cm_el3_sysregs_context_restore(uint32_t security_state);
-extern void cm_el1_sysregs_context_save(uint32_t security_state);
-extern void cm_el1_sysregs_context_restore(uint32_t security_state);
-extern void cm_set_el3_eret_context(uint32_t security_state, uint64_t entrypoint,
-		uint32_t spsr, uint32_t scr);
-extern void cm_set_elr_el3(uint32_t security_state, uint64_t entrypoint);
-extern void cm_write_scr_el3_bit(uint32_t security_state,
-				 uint32_t bit_pos,
-				 uint32_t value);
-extern void cm_set_next_eret_context(uint32_t security_state);
-extern void cm_init_pcpu_ptr_cache();
-extern void cm_set_pcpu_ptr_cache(const void *pcpu_ptr);
-extern void *cm_get_pcpu_ptr_cache(void);
-extern uint32_t cm_get_scr_el3(uint32_t security_state);
+void cm_init(void);
+void *cm_get_context(uint64_t mpidr, uint32_t security_state);
+void cm_set_context(uint64_t mpidr,
+		    void *context,
+		    uint32_t security_state);
+void cm_el3_sysregs_context_save(uint32_t security_state);
+void cm_el3_sysregs_context_restore(uint32_t security_state);
+void cm_el1_sysregs_context_save(uint32_t security_state);
+void cm_el1_sysregs_context_restore(uint32_t security_state);
+void cm_set_el3_eret_context(uint32_t security_state, uint64_t entrypoint,
+			     uint32_t spsr, uint32_t scr);
+void cm_set_elr_el3(uint32_t security_state, uint64_t entrypoint);
+void cm_write_scr_el3_bit(uint32_t security_state,
+			  uint32_t bit_pos,
+			  uint32_t value);
+void cm_set_next_eret_context(uint32_t security_state);
+void cm_init_pcpu_ptr_cache();
+void cm_set_pcpu_ptr_cache(const void *pcpu_ptr);
+void *cm_get_pcpu_ptr_cache(void);
+uint32_t cm_get_scr_el3(uint32_t security_state);
 #endif /* __CM_H__ */