phy: ralink: mt7621-pci: add sentinel to quirks table

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: phy: ralink: mt7621-pci: add sentinel to quirks table With mt7621 soc_dev_attr fixed to register the soc as a device, kernel will experience an oops in soc_device_match_attr This quirk test was introduced in the staging driver in commit 9445ccb3714c ("staging: mt7621-pci-phy: add quirks for 'E2' revision using 'soc_device_attribute'"). The staging driver was removed, and later re-added in commit d87da32372a0 ("phy: ralink: Add PHY driver for MT7621 PCIe PHY") for kernel 5.11

References

• https://git.kernel.org/stable/c/500bcd3a99eae84412067c3b9e7ffba1c66e6383
• https://git.kernel.org/stable/c/d539cfd1202d66c2dcea383f1d96835ae72d5809
• https://git.kernel.org/stable/c/819b885cd886c193782891c4f51bbcab3de119a4