clk: agilex/stratix10: remove noc_clk

Early documentation had a noc_clk, but in reality, it's just the
noc_free_clk. Remove the noc_clk clock and just use the noc_free_clk.

Fixes: 80c6b7a0

 ("clk: socfpga: agilex: add clock driver for the Agilex platform")
Cc: stable@vger.kernel.org
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Link: https://lore.kernel.org/r/20210611025201.118799-1-dinguyen@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>