make_helpers: tbbr: Fix FWU certificate generation

Provide missed command line parameters such as KEY_ALG, HASH_ALG
and KEY_SIZE while generating the FWU certificate.

Signed-off-by: Gilad Ben Yossef <Gilad.BenYossef@arm.com>
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: I017fa3fff844f4262ae2441cbc9fee909d357fb3