phy: samsung: Use readl_poll_timeout function

Instead of a busy waiting while loop using udelay
use readl_poll_timeout function to check the condition
is met or timeout occurs in crport_handshake function.
readl_poll_timeout is called in non atomic context so
it safe to sleep until the condition is met.

Signed-off-by: Anand Moon <linux.amoon@gmail.com>
Link: https://lore.kernel.org/r/20200720173502.542-1-linux.amoon@gmail.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>