net: stmmac: mdio_bus_data->default_an_inband is boolean

net: stmmac: mdio_bus_data->default_an_inband is boolean

default_an_inband is declared as an unsigned int, but is set to true/
false and is assigned to phylink_config's member of the same name
which is a bool. Declare this also as a bool for consistency.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/E1vy6AT-0000000BtxD-2qm7@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>