rockchip: efuse: Refactor to use driver data and ops

Refactor the driver to use driver data and ops to simplify handling
of SoCs that require a unique read op.

Move handling of the aligned bounce buffer to main read op in order to
keep the SoC unique read op simple.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>