fix(xilinx): remove asserts around arg0/arg1

The commit a6f340fe58b9 ("Introduce the new BL handover interface")
extended handoff to 4 registers instead of 2. Arguments arg0-3 are
not used by platform code but in future they can be used for it.
But it doesn't make sense to checking their unused value.

Change-Id: I151e4b1574465409424453c054d937487086b79a
Signed-off-by: Michal Simek <michal.simek@amd.com>
3 files changed