power: pmic-voter: make debug status more parsable

The status debug property lists all of the voters, their enable and
value status, and the effective result. Currently the status is
presented on multiple lines which is difficult to parse. Change the
format to be more parsable.

Print each voter in the following format:
VOTABLE: CLIENT: en=1 v=1000

Print a single summary line at the end in the following format:
VOTABLE: effective=EFFECTIVE_CLIENT type=VOTABLE_TYPE v=1000

Change-Id: I0671cdd8e0911450bafe4869cb49cc48bd622a81
Signed-off-by: Nicholas Troast <ntroast@codeaurora.org>