ahci: Add Hygon Dhyana support

[puwen_hygon.cn]

Summary

Add Hygon PCI ID and description to ahci_ids for AHCI SATA controller.

[mav]

Hi. Does the Hygon really have only one AHCI ID where AMD had 5?

[emaste]

please upload with context and presumably the new entry should be sorted in alpha oder

[puwen_hygon.cn]

In D23556#517181, @mav wrote:

Hi. Does the Hygon really have only one AHCI ID where AMD had 5?

Hygon Dhyana has only 1 AHCI ID(0x7901), assume AMD's 5 AHCI IDs might refer to its 5 generation.

[puwen_hygon.cn]

In D23556#517250, @emaste wrote:

please upload with context and presumably the new entry should be sorted in alpha oder

Ok, will sort in alpha order.

[puwen_hygon.cn]

Sort the new entry in alpha order.