net: stmmac: move and rename dwmac_pcs_isr()

net: stmmac: move and rename dwmac_pcs_isr()

dwmac_pcs_isr() doesn't need to be inlined into the MAC's
host_irq_status method, as handling PCS interrupts isn't performance
critical. However, there is little point calling this function unless
an interrupt is pending for the PCS.

Rename it to stmmac_integrated_pcs_irq() while moving it.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1vevHm-00000002YoS-23RX@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>