x86/amd_nb: Add support for Hygon family 18h model 6h

hygon inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I7DX6V


CVE: NA

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Hygon family 18h model 6h processor has the same DF F1 device ID
as M05H_DF_F1.

Signed-off-by: Pu Wen <puwen@hygon.cn>