clk: X1000: Add support for the X1000 v2.

From: Zhou Yanjie
Date: Tue Oct 22 2019 - 12:57:20 EST


v1->v2:use BIT() macro instead left shift, add a call of
"ingenic_cgu_register_syscore_ops()", replace "CLK_OF_DECLARE"
with a "CLK_OF_DECLARE_DRIVER".