serial: omap: repair building without PM_SLEEP

A recent bug fix in 3.10, ddd85e22 "serial: omap: prevent runtime PM for
"no_console_suspend"", introduced a regression from an obvious typo:

drivers/tty/serial/omap-serial.c:1677:14: error: 'serial_omap_complete'
	undeclared here (not in a function)

This changes the incorrectly added macro to the one that we need instead.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Bin Liu <b-liu@ti.com>
Acked-by: Sourav Poddar<sourav.poddar@ti.com>
Tested-by: Sourav Poddar<sourav.poddar@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/omap-serial.c

@@ -1326,7 +1326,7 @@ static int serial_omap_resume(struct device *dev)
 }
 #else
 #define serial_omap_prepare NULL
-#define serial_omap_prepare NULL
+#define serial_omap_complete NULL
 #endif /* CONFIG_PM_SLEEP */
 
 static void omap_serial_fill_features_erratas(struct uart_omap_port *up)