This reverts commit 3241929b.

Armada 3720 phy driver (phy-mvebu-a3700-comphy.c) does not return
-EOPNOTSUPP from phy_power_on() callback anymore.

So remove XHCI_SKIP_PHY_INIT flag from xhci_mvebu_a3700_plat_setup() and
then also whole xhci_mvebu_a3700_plat_setup() function which is there just
to handle -EOPNOTSUPP for XHCI_SKIP_PHY_INIT.

xhci plat_setup callback is not used by any other xhci plat driver, so
remove this callback completely.
Signed-off-by: NPali Rohár <pali@kernel.org>
Signed-off-by: NMarek Behún <kabel@kernel.org>
Acked-by: NMiquel Raynal <miquel.raynal@bootlin.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220203214444.1508-5-kabel@kernel.orgSigned-off-by: NVinod Koul <vkoul@kernel.org>