clk: mvebu: use time_is_before_eq_jiffies() instead of open coding it

Use the helper function time_is_{before,after}_jiffies() to improve
code readability.

Signed-off-by: Wang Qing <wangqing@vivo.com>
Link: https://lore.kernel.org/r/1644890154-64915-3-git-send-email-wangqing@vivo.com


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