tf-a-coverity: Upgrade Coverity scan to version 2021.12.1

Synopsys made an announcement stating Coverity Scan 2021.12.1 will
be released and made available on or about Feb 13,2022.

This patch will also fix the job fail as old version of the binaries
are no longer available from Synopsys Coverity portal.

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I12a7b56996c3859d7164cfd5675770d7a87cc605
1 file changed