drm/amdgpu: Fix PCI device refcount leak in amdgpu_atrm_get_bios()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix PCI device refcount leak in amdgpu_atrm_get_bios() As comment of pci_get_class() says, it returns a pci_device with its refcount increased and decreased the refcount for the input parameter @from if it is not NULL. If we break the loop in amdgpu_atrm_get_bios() with 'pdev' not NULL, we need to call pci_dev_put() to decrease the refcount. Add the missing pci_dev_put() to avoid refcount leak.

References

• https://git.kernel.org/stable/c/6611feef35c0c8c4d297b28a7fc6ab3a2c47eca7
• https://git.kernel.org/stable/c/da7c78ea9e62bb65273d3ff19a3866ec205bfe18
• https://git.kernel.org/stable/c/3360125d721c91d697c71201f18f042ff743e936
• https://git.kernel.org/stable/c/981024abf5fe605c94d4f906f65d1b3408d628be
• https://git.kernel.org/stable/c/7c1ddf7c664b5bc91f14b1bdeaa45520ef1760e4
• https://git.kernel.org/stable/c/8f2d2badf8ca5e7e7c30d88840b695c8af7286f3
• https://git.kernel.org/stable/c/9d4057d0452243917e12eb19f1599c96f2f05b14
• https://git.kernel.org/stable/c/a8b54ad7106c0604c4adc4933138b3557739bce0
• https://git.kernel.org/stable/c/ca54639c7752edf1304d92ff4d0c049d4efc9ba0