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/examples/standalone/atmel_df_pow2.c b/examples/standalone/atmel_df_pow2.c
index b7bd243..b71b406 100644
--- a/examples/standalone/atmel_df_pow2.c
+++ b/examples/standalone/atmel_df_pow2.c
@@ -115,7 +115,7 @@
 	}
 }
 
-int atmel_df_pow2(int argc, char * const argv[])
+int atmel_df_pow2(int argc, char *const argv[])
 {
 	/* Print the ABI version */
 	app_startup(argv);
diff --git a/examples/standalone/hello_world.c b/examples/standalone/hello_world.c
index 1f61bb4..263cd9c 100644
--- a/examples/standalone/hello_world.c
+++ b/examples/standalone/hello_world.c
@@ -7,7 +7,7 @@
 #include <common.h>
 #include <exports.h>
 
-int hello_world (int argc, char * const argv[])
+int hello_world(int argc, char *const argv[])
 {
 	int i;
 
diff --git a/examples/standalone/smc91111_eeprom.c b/examples/standalone/smc91111_eeprom.c
index 5ffefc8..a43d14f 100644
--- a/examples/standalone/smc91111_eeprom.c
+++ b/examples/standalone/smc91111_eeprom.c
@@ -31,7 +31,7 @@
 int read_eeprom_reg (struct eth_device *dev, int reg);
 void print_macaddr (struct eth_device *dev);
 
-int smc91111_eeprom (int argc, char * const argv[])
+int smc91111_eeprom(int argc, char *const argv[])
 {
 	int c, i, j, done, line, reg, value, start, what;
 	char input[50];
diff --git a/examples/standalone/smc911x_eeprom.c b/examples/standalone/smc911x_eeprom.c
index 8acfcb9..9bd9a6e 100644
--- a/examples/standalone/smc911x_eeprom.c
+++ b/examples/standalone/smc911x_eeprom.c
@@ -466,7 +466,7 @@
 /**
  *	smc911x_eeprom - our application's main() function
  */
-int smc911x_eeprom(int argc, char * const argv[])
+int smc911x_eeprom(int argc, char *const argv[])
 {
 	/* Avoid initializing on stack as gcc likes to call memset() */
 	struct eth_device dev;
diff --git a/examples/standalone/stubs.c b/examples/standalone/stubs.c
index 0827bde..5fb4604 100644
--- a/examples/standalone/stubs.c
+++ b/examples/standalone/stubs.c
@@ -2,6 +2,8 @@
 #include <exports.h>
 #include <linux/compiler.h>
 
+struct cmd_tbl;
+
 #define FO(x) offsetof(struct jt_funcs, x)
 
 #if defined(CONFIG_X86)