usb:gadget:Remove redundant #includes for USB composite gadget and its functions

Only the <linux/usb/gadget.h> requires error.h include. Hence, several
includes of error.h at USB gadget functions are not needed.

Moreover unnecessary malloc.h includes were also removed.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Cc: Marek Vasut <marex@denx.de>

common/cmd_dfu.c

@@ -9,10 +9,7 @@
  */
 
 #include <common.h>
-#include <command.h>
-#include <malloc.h>
 #include <dfu.h>
-#include <asm/errno.h>
 #include <g_dnl.h>
 
 static int do_dfu(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])

common/cmd_usb_mass_storage.c

@@ -5,7 +5,6 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
-#include <errno.h>
 #include <common.h>
 #include <command.h>
 #include <g_dnl.h>

drivers/usb/gadget/g_dnl.c

@@ -7,7 +7,6 @@
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
-#include <errno.h>
 #include <common.h>
 #include <malloc.h>
 

include/linux/usb/gadget.h

@@ -18,6 +18,7 @@
 #ifndef __LINUX_USB_GADGET_H
 #define __LINUX_USB_GADGET_H
 
+#include <errno.h>
 #include <linux/list.h>
 
 struct usb_ep;