mlxsw: Make pci module dependent on HAS_DMA and HAS_IOMEM

This resolves compile errors on um-allyesconfig.

Note that there are many other drivers which have the same issue.
Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/Kconfig

@@ -12,7 +12,7 @@ config MLXSW_CORE
 
 config MLXSW_PCI
 	tristate "PCI bus implementation for Mellanox Technologies Switch ASICs"
-	depends on PCI && MLXSW_CORE
+	depends on PCI && HAS_DMA && HAS_IOMEM && MLXSW_CORE
 	default m
 	---help---
 	  This is PCI bus implementation for Mellanox Technologies Switch ASICs.