clk: Ingenic: Add support for TCU of X1000.

X1000 has a different TCU, since X1000 OST has been independent of TCU.
This patch is add TCU support of X1000, and prepare for later OST driver.

Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Link: https://lkml.kernel.org/r/1584457893-40418-3-git-send-email-zhouyanjie@wanyeetech.com


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