net: stmmac: dwmac4: clear LPI_CTRL_STATUS_LPITCSE too

Ensure that LPI_CTRL_STATUS_LPITCSE is also appropriately cleared when
disabling LPI or enabling LPI without TX clock gating.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1tffdx-003ZIZ-JQ@rmk-PC.armlinux.org.uk


Signed-off-by: Jakub Kicinski <kuba@kernel.org>