net: wireless: bcmdhd: Verify SSID length

(cherry pick from commit c8a8d33845f07755f3bab9af3ac6a6fa18a09b3d)

Ensure SSID length is correct before memcpy

Signed-off-by: Ashwin <ashwin.bhat@broadcom.com>
Bug: 26571522
Bug: 27240072
Change-Id: I2b0279cd360fad613546c8aa280e0c6f4524763c
Tracked-On: https://jira01.devtools.intel.com/browse/AW-691


Signed-off-by: Victor Tasayco Loarte <victorx.tasayco.loarte@intel.com>