LoongArch: defconfig: Set CONFIG_TXGBE=m by default

LoongArch inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5OHOB

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Ensure the netswift 10G NIC driver ko can be distributed in ISO on
LoongArch.
Signed-off-by: NHongchen Zhang <zhanghongchen@loongson.cn>

arch/loongarch/configs/loongson3_defconfig

@@ -286,6 +286,7 @@ CONFIG_NET_ACT_MIRRED=m
 CONFIG_NET_ACT_IPT=m
 CONFIG_NET_ACT_NAT=m
 CONFIG_NET_ACT_BPF=m
+CONFIG_DCB=y
 CONFIG_OPENVSWITCH=m
 CONFIG_VSOCKETS=m
 CONFIG_VIRTIO_VSOCKETS=m
@@ -449,6 +450,7 @@ CONFIG_E1000E=y
 CONFIG_IGB=y
 CONFIG_IXGB=y
 CONFIG_IXGBE=y
+CONFIG_TXGBE=m
 # CONFIG_NET_VENDOR_MARVELL is not set
 # CONFIG_NET_VENDOR_MELLANOX is not set
 # CONFIG_NET_VENDOR_MICREL is not set