wlan: Skip IE which has length less than the minimum valid IE length

QBSS IE uses min length of 4 bytes for version 1 and
min length of 5 bytes for version 2. Min length used
for IE is 5 bytes in driver which can cause WPA IE
parse failure if QBSS IE is 4 bytes resulting in failure
in fetching scan results due to security mismatch and
subsequently connection failure.

Fix is to skip the IE which has length less than the
minimum valid length.

Change-Id: I00fbffad221e2d9ecedcb87c9607ac8abd7c55b1
CRs-Fixed: 2348006