x86/amd_nb: Add support for Hygon family 18h model 5h

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


CVE: NA

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Add root and DF F1/F3/F4 device IDs for Hygon family 18h model
5h processors. But some model 5h processors have the legacy(M04H)
DF devices, so add a if conditional to read the df1 register.

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