clk: Fix comment typo

The double `to' is duplicated in the comment, remove one.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Link: https://lore.kernel.org/r/20220811140030.28886-1-wangborong@cdjrlc.com


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