Documentaion: leds: leds-lp55xx.txt: Fix typos

Fix spelling mistakes in leds-lp55xx.txt file to make documentation
clear.
Signed-off-by: NTamara Diaconita <diaconita.tamara@gmail.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

Documentation/leds/leds-lp55xx.txt

@@ -117,7 +117,7 @@ As soon as 'loading' is set to 0, registered callback is called.
 Inside the callback, the selected engine is loaded and memory is updated.
 To run programmed pattern, 'run_engine' attribute should be enabled.
 
-The pattern sqeuence of LP8501 is similar to LP5523.
+The pattern sequence of LP8501 is similar to LP5523.
 However pattern data is specific.
 Ex 1) Engine 1 is used
 echo 1 > /sys/bus/i2c/devices/xxxx/select_engine