stm32mp1: bsec: add missing dev in function comment

Add the missing @dev reference in some function description.

Fixes: b66bfdf2 ("arm: stm32mp: bsec: migrate trace to log macro")
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>