arm: socfpga_defconfig: enable USB dual-role and cleanup

CONFIG_IP_PNP_DHCP=y

CONFIG_IP_PNP_BOOTP=y

CONFIG_IP_PNP_RARP=y

CONFIG_IPV6=y

CONFIG_NETWORK_PHY_TIMESTAMPING=y

CONFIG_VLAN_8021Q=y

CONFIG_VLAN_8021Q_GVRP=y

# CONFIG_SCSI_LOWLEVEL is not set

CONFIG_NETDEVICES=y

CONFIG_STMMAC_ETH=y

CONFIG_DWMAC_SOCFPGA=y

CONFIG_MICREL_PHY=y

CONFIG_INPUT_EVDEV=y

# CONFIG_SERIO_SERPORT is not set

CONFIG_REGULATOR_FIXED_VOLTAGE=y

CONFIG_USB=y

CONFIG_USB_DWC2=y

CONFIG_USB_DWC2_HOST=y

CONFIG_NOP_USB_XCEIV=y

CONFIG_USB_GADGET=y

CONFIG_MMC=y

CONFIG_MMC_DW=y

CONFIG_FPGA=y

CONFIG_EXT2_FS_XATTR=y

CONFIG_EXT2_FS_POSIX_ACL=y

CONFIG_EXT3_FS=y

CONFIG_EXT4_FS=y

CONFIG_VFAT_FS=y

CONFIG_NTFS_FS=y

CONFIG_NTFS_RW=y