leds: leds-pm8xxx: Add individual WLED string control

Add ability to choose which WLEDs to turn on, instead of
only 1, 2 or 3 starting from the left side.

Change-Id: I1c2ae88e9150801d98f9f85bbc4d2edf693de658
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>
3 files changed