Add support for the new way of specifying the clock parents. Add the
two new functions
    clk_hw_register_composite_pdata()
    clk_register_composite_pdata()
to let the driver provide parent_data instead of the parent_names.
Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lkml.kernel.org/r/20200102231101.11834-1-michael@walle.ccSigned-off-by: Stephen Boyd <sboyd@kernel.org>