style(crypto): add braces for if statement

As per TF-A coding style[1] braces around single if statement is preferred.
Minor cleanup to adhere to it.

[1]: https://trustedfirmware-a.readthedocs.io/en/latest/process/coding-style.html#conditional-statement-bodies

Change-Id: I771fdcbf105eac9377002ac67d0615ef29440904
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
2 files changed