[PATCH net-next] net: microchip: sparx5: fix kconfig warning

[Randy Dunlap]

PHY_SPARX5_SERDES depends on OF so SPARX5_SWITCH should also depend
on OF since 'select' does not follow any dependencies.

WARNING: unmet direct dependencies detected for PHY_SPARX5_SERDES
  Depends on [n]: (ARCH_SPARX5 || COMPILE_TEST [=n]) && OF [=n] && HAS_IOMEM [=y]
  Selected by [y]:
  - SPARX5_SWITCH [=y] && NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_MICROCHIP [=y] && NET_SWITCHDEV [=y] && HAS_IOMEM [=y]

Fixes: 3cfa11bac9bb ("net: sparx5: add the basic sparx5 driver")
Signed-off-by: Randy Dunlap <rdunlap at infradead.org>
Cc: Lars Povlsen <lars.povlsen at microchip.com>
Cc: Steen Hegelund <Steen.Hegelund at microchip.com>
Cc: UNGLinuxDriver at microchip.com
Cc: linux-arm-kernel at lists.infradead.org
Cc: "David S. Miller" <davem at davemloft.net>
Cc: Jakub Kicinski <kuba at kernel.org>
Cc: netdev at vger.kernel.org
---
 drivers/net/ethernet/microchip/sparx5/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20210708.orig/drivers/net/ethernet/microchip/sparx5/Kconfig
+++ linux-next-20210708/drivers/net/ethernet/microchip/sparx5/Kconfig
@@ -2,6 +2,7 @@ config SPARX5_SWITCH
 	tristate "Sparx5 switch driver"
 	depends on NET_SWITCHDEV
 	depends on HAS_IOMEM
+	depends on OF
 	select PHYLINK
 	select PHY_SPARX5_SERDES
 	select RESET_CONTROLLER