net: phy: broadcom: Avoid forward for bcm54xx_config_clock_delay()

[ Upstream commit 133bf7b4 ]

Avoid a forward declaration by moving the callers of
bcm54xx_config_clock_delay() below its body.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>