x86: Drop unused init_helper functions

Drop init_bd_struct_r() which is no-longer used. Also drop the declaration
for init_func_spi() since this is now handled by generic board init.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/include/asm/init_helpers.h

@@ -9,7 +9,5 @@
 #define _INIT_HELPERS_H_
 
 int init_cache_f_r(void);
-int init_bd_struct_r(void);
-int init_func_spi(void);
 
 #endif	/* !_INIT_HELPERS_H_ */

arch/x86/lib/init_helpers.c

@@ -30,13 +30,3 @@ int init_cache_f_r(void)
 	/* Initialise the CPU cache(s) */
 	return init_cache();
 }
-
-bd_t bd_data;
-
-int init_bd_struct_r(void)
-{
-	gd->bd = &bd_data;
-	memset(gd->bd, 0, sizeof(bd_t));
-
-	return 0;
-}