clk: versal: Remove alt_ref_clk from clock sources

alt_ref_clk is applicable only for PS extended version.
For PS base version there is no separate alt_ref_clk.
It is tied with ref_clk, so remove it from driver.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
1 file changed