clk: fixed: Remove Allwinner A10 special-case logic

This compatible is part of the legacy sunxi clock support, and has not
been used since commit 6b48644b ("ARM: gr8: Convert to CCU") in
October 2016. Since supporting this compatible adds some overhead to
generic clock code, let's clean it up.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20220531051742.43273-1-samuel@sholland.org


Signed-off-by: Stephen Boyd <sboyd@kernel.org>