qcacld-3.0: Change best candidate weight from 100 to 200

With new scoring parameters, host calculates candidate
scores equal to the best candidate score, and connects
with best candidate, without considering the bssid hint
from userspace.

Increase the max limit of the best candidate from 10000
to 20000, to keep score of preferred candidate at the top.

Change-Id: I31a71a715eb3ad29987886558e20cf2a9fec66e9
CRs-Fixed: 3084044