[WCNCR00166629] misc: Fix coverity issues under mgmt/

[Description]
Fix coverity issues under mgmt/

i. Fix CID70639 "Dereference before null check" in
p2pFsmRunEventScanDone()
ii. Fix CID15588 "Missing break in switch" in p2pFuncSwitchOPMode()

Change-Id: I940f403d7d055bd1ec97290bc23ddb3852a34521
Signed-off-by: Awk Jiang <awk.jiang@mediatek.com>
CR-Id: WCNCR00166629
Feature: misc
2 files changed