command: Remove the cmd_tbl_t typedef

We should not use typedefs in U-Boot. They cannot be used as forward
declarations which means that header files must include the full header to
access them.

Drop the typedef and rename the struct to remove the _s suffix which is
now not useful.

This requires quite a few header-file additions.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-tegra/cmd_enterrcm.c b/arch/arm/mach-tegra/cmd_enterrcm.c
index b2252f3..110d441 100644
--- a/arch/arm/mach-tegra/cmd_enterrcm.c
+++ b/arch/arm/mach-tegra/cmd_enterrcm.c
@@ -25,13 +25,14 @@
  */
 
 #include <common.h>
+#include <command.h>
 #include <cpu_func.h>
 #include <irq_func.h>
 #include <asm/arch/tegra.h>
 #include <asm/arch-tegra/pmc.h>
 
-static int do_enterrcm(cmd_tbl_t *cmdtp, int flag, int argc,
-		       char * const argv[])
+static int do_enterrcm(struct cmd_tbl *cmdtp, int flag, int argc,
+		       char *const argv[])
 {
 	puts("Entering RCM...\n");
 	udelay(50000);