sh: Fix build errors for generic board

This includes the following fixes:
- Define needed __init_end symbol - see initr_reloc_global_data()
- Drop SH-specific struct bd_info
- Add an empty relocate_code() function

This prevents build errors with generic board, but the code will still need
work. Perhaps this is a better alternative than deleting the code.

Signed-off-by: Simon Glass <sjg@chromium.org>

arch/sh/include/asm/u-boot.h

@@ -12,16 +12,8 @@
 #ifndef __ASM_SH_U_BOOT_H_
 #define __ASM_SH_U_BOOT_H_
 
-typedef struct bd_info {
-	unsigned long   bi_memstart;    /* start of DRAM memory */
-	phys_size_t	bi_memsize;     /* size  of DRAM memory in bytes */
-	unsigned long   bi_flashstart;  /* start of FLASH memory */
-	unsigned long   bi_flashsize;   /* size  of FLASH memory */
-	unsigned long   bi_flashoffset; /* reserved area for startup monitor */
-	unsigned long   bi_sramstart;   /* start of SRAM memory */
-	unsigned long   bi_sramsize;    /* size  of SRAM memory */
-	unsigned long	bi_boot_params; /* where this board expects params */
-} bd_t;
+/* Use the generic board which requires a unified bd_info */
+#include <asm-generic/u-boot.h>
 
 /* For image.h:image_check_target_arch() */
 #define IH_ARCH_DEFAULT IH_ARCH_SH