net: stmmac: dwmac-meson8b: Make the clock enabling code re-usable
The timing adjustment clock will need similar logic as the RGMII clock: It has to be enabled in the driver conditionally and when the driver is unloaded it should be disabled again. Extract the existing code for the RGMII clock into a new function so it can be re-used. Reviewed-by:Andrew Lunn <andrew@lunn.ch> Signed-off-by:
Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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