reg_t -> struct reg

Remove misleading typedef and redundant suffix from struct reg.

src/target/armv4_5.h

@@ -177,7 +177,7 @@ static __inline enum armv4_5_mode armv4_5_number_to_mode(int number)
 
 int armv4_5_arch_state(struct target_s *target);
 int armv4_5_get_gdb_reg_list(target_t *target,
-		reg_t **reg_list[], int *reg_list_size);
+		struct reg **reg_list[], int *reg_list_size);
 
 int armv4_5_register_commands(struct command_context_s *cmd_ctx);
 int armv4_5_init_arch_info(target_t *target, struct arm *armv4_5);