treewide: convert bd_t to struct bd_info by coccinelle

The Linux coding style guide (Documentation/process/coding-style.rst)
clearly says:

  It's a **mistake** to use typedef for structures and pointers.

Besides, using typedef for structures is annoying when you try to make
headers self-contained.

Let's say you have the following function declaration in a header:

  void foo(bd_t *bd);

This is not self-contained since bd_t is not defined.

To tell the compiler what 'bd_t' is, you need to include <asm/u-boot.h>

  #include <asm/u-boot.h>
  void foo(bd_t *bd);

Then, the include direcective pulls in more bloat needlessly.

If you use 'struct bd_info' instead, it is enough to put a forward
declaration as follows:

  struct bd_info;
  void foo(struct bd_info *bd);

Right, typedef'ing bd_t is a mistake.

I used coccinelle to generate this commit.

The semantic patch that makes this change is as follows:

  <smpl>
  @@
  typedef bd_t;
  @@
  -bd_t
  +struct bd_info
  </smpl>

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
diff --git a/board/freescale/t102xrdb/spl.c b/board/freescale/t102xrdb/spl.c
index aed0721..da442fc 100644
--- a/board/freescale/t102xrdb/spl.c
+++ b/board/freescale/t102xrdb/spl.c
@@ -98,10 +98,10 @@
 
 void board_init_r(gd_t *gd, ulong dest_addr)
 {
-	bd_t *bd;
+	struct bd_info *bd;
 
-	bd = (bd_t *)(gd + sizeof(gd_t));
-	memset(bd, 0, sizeof(bd_t));
+	bd = (struct bd_info *)(gd + sizeof(gd_t));
+	memset(bd, 0, sizeof(struct bd_info));
 	gd->bd = bd;
 	bd->bi_memstart = CONFIG_SYS_INIT_L3_ADDR;
 	bd->bi_memsize = CONFIG_SYS_L3_SIZE;