arm: socfpga: gen5 enable designware_socfpga

Enable the socfpga specific designware ethernet driver by default for
socfpga by implying it when enabling CONFIG_ETH_DESIGNWARE for a
MACH_SOCFPGA config.

This is required to remove the hacky reset and phy mode handling in
arch/arm/mach-socfpga.
Signed-off-by: NSimon Goldschmidt <simon.k.r.goldschmidt@gmail.com>

drivers/net/Kconfig

@@ -156,6 +156,7 @@ config ETH_SANDBOX_RAW
 config ETH_DESIGNWARE
 	bool "Synopsys Designware Ethernet MAC"
 	select PHYLIB
+	imply ETH_DESIGNWARE_SOCFPGA if ARCH_SOCFPGA
 	help
 	  This MAC is present in SoCs from various vendors. It supports
 	  100Mbit and 1 Gbit operation. You must enable CONFIG_PHYLIB to