forked from Mirrors/opensbi

Instead of having hsm_start(), hsm_stop() and hsm_suspend() callbacks in platform operations, it will be much simpler for HSM driver to directly register these operations as a device to the sbi_hsm implementation. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>