drivers: ipa: fix typos for ipa_smp2p structure doc

Remove the duplicate "mutex", and change "Motex" to "Mutex". Also I
recommend it's easier for understanding to make the "ready-interrupt"
a bundle for it is a parallel description as "shutdown" which is appended
after the slash.
Signed-off-by: Wang Wenhu <wenhu.wang@vivo.com>
Cc: Alex Elder <elder@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipa/ipa_smp2p.c

@@ -53,7 +53,7 @@
  * @clock_on:		Whether IPA clock is on
  * @notified:		Whether modem has been notified of clock state
  * @disabled:		Whether setup ready interrupt handling is disabled
- * @mutex mutex:	Motex protecting ready interrupt/shutdown interlock
+ * @mutex:		Mutex protecting ready-interrupt/shutdown interlock
  * @panic_notifier:	Panic notifier structure
 */
 struct ipa_smp2p {