clk: socfpga: Convert to s10/agilex/n5x to use clk_hw

commit  cc374dc5120c576abc85b3dd761a105cb3723149 from
https://github.com/altera-opensource/linux-socfpga.git

[upstream commit ba7e2584

]

As recommended by Stephen Boyd, convert the Agilex/Stratix10/n5x clock
driver to use the clk_hw registration method.

Suggested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Link: https://lore.kernel.org/r/20210302214151.1333447-3-dinguyen@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Meng Li <Meng.Li@windriver.com>