usb: gadget: Fix typo fond in Documentation/Docbook/gadget.xml

This patch fix some spelling typo found in gadget.xml.
It is because this file is generated from comments in sources,
I had to fix comments in the source, instead of xml file itself.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/composite.c

@@ -1161,11 +1161,11 @@ static struct usb_gadget_string_container *copy_gadget_strings(
  * This function will create a deep copy of usb_gadget_strings and usb_string
  * and attach it to the cdev. The actual string (usb_string.s) will not be
  * copied but only a referenced will be made. The struct usb_gadget_strings
- * array may contain multiple languges and should be NULL terminated.
+ * array may contain multiple languages and should be NULL terminated.
  * The ->language pointer of each struct usb_gadget_strings has to contain the
  * same amount of entries.
  * For instance: sp[0] is en-US, sp[1] is es-ES. It is expected that the first
- * usb_string entry of es-ES containts the translation of the first usb_string
+ * usb_string entry of es-ES contains the translation of the first usb_string
  * entry of en-US. Therefore both entries become the same id assign.
  */
 struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev,

include/linux/usb/gadget.h

@@ -190,7 +190,7 @@ struct usb_ep {
  * @ep:the endpoint being configured
  * @maxpacket_limit:value of maximum packet size limit
  *
- * This function shoud be used only in UDC drivers to initialize endpoint
+ * This function should be used only in UDC drivers to initialize endpoint
  * (usually in probe function).
  */
 static inline void usb_ep_set_maxpacket_limit(struct usb_ep *ep,