imx: hab: Make usage of packed attribute consistent

imx: hab: Make usage of packed attribute consistent

commit cd2d46003ce1 ("arm: imx: hab: Add IVT header definitions") declares
struct ivt_header as "__attribute__((packed))".

commit ed286bc80e9d ("imx: hab: Check if CSF is valid before
authenticating image") declares struct hab_hdr with __packed.

This patch makes the __packed convention consistent.

Signed-off-by: Bryan O'Donoghue <[email protected]>
Cc: Utkarsh Gupta <[email protected]>
Cc: Breno Lima <[email protected]>
Cc: Fabio Estevam <[email protected]>
Reviewed-by: Fabio Estevam <[email protected]>