net: stmmac: avoid passing pci_dev

net: stmmac: avoid passing pci_dev

The pci_dev is only used to provide the ethtool bus_info using
pci_name(priv->plat->pdev). This is the same as dev_name(priv->device).
Thus, rather than passing the pci_dev, make use of what we already
have.

To avoid unexpectedly exposing the device name through ethtool where
it wasn't provided before, add a flag priv->plat->provide_bus_info
to enable this, which only dwmac-intel needs to set.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/E1w0evI-0000000CzY7-1fyo@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>