led: toggle LED on initial SW blink

led: toggle LED on initial SW blink

We currently init the LED OFF when SW blink is triggered when
on_state_change() is called. This can be problematic for very short
period as the ON/OFF blink might never trigger.

Toggle the LED (ON if OFF, OFF if ON) on initial SW blink to handle this
corner case and better display a LED blink from the user.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>