This adds support for the WLED ('White' LED) block on Qualcomm's
PM8941 PMICs.

(cooloney@gmail.com: remove unneeded semicolon)
Signed-off-by: NCourtney Cavin <courtney.cavin@sonymobile.com>
Signed-off-by: NBjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: NBryan Wu <cooloney@gmail.com>