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/drivers/net/e1000.h b/drivers/net/e1000.h
index 2ae3085..19ed477 100644
--- a/drivers/net/e1000.h
+++ b/drivers/net/e1000.h
@@ -74,8 +74,8 @@
 #endif
 
 #ifdef CONFIG_E1000_SPI
-int do_e1000_spi(cmd_tbl_t *cmdtp, struct e1000_hw *hw,
-		int argc, char * const argv[]);
+int do_e1000_spi(struct cmd_tbl *cmdtp, struct e1000_hw *hw,
+		 int argc, char *const argv[]);
 #endif
 
 /* Enumerated types specific to the e1000 hardware */