Revert "drm/amd: Check if ASPM is enabled from PCIe subsystem"

This reverts commit 7294863a6f01248d72b61d38478978d638641bee.

This commit was erroneously applied again after commit 0ab5d711ec74
("drm/amd: Refactor `amdgpu_aspm` to be evaluated per device")
removed it, leading to very hard to debug crashes, when used with a system with two
AMD GPUs of which only one supports ASPM.

Link: https://lore.kernel.org/linux-acpi/[e-mail]/
Link: https://github.com/acpica/acpica/issues/1060
Fixes: 0ab5d711ec74 ("drm/amd: Refactor `amdgpu_aspm` to be evaluated per device")
Signed-off-by: Bert Karwatzki <[e-mail]>
Reviewed-by: Christian König <[e-mail]>
Reviewed-by: Mario Limonciello (AMD) <[e-mail]>
Signed-off-by: Mario Limonciello <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>
(cherry picked from commit 97a9689300eb2b393ba5efc17c8e5db835917080)
Cc: [e-mail]

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

···
 			return -ENODEV;
 	}
 
-	if (amdgpu_aspm == -1 && !pcie_aspm_enabled(pdev))
-		amdgpu_aspm = 0;
-
 	if (amdgpu_virtual_display ||
 	    amdgpu_device_asic_has_dc_support(pdev, flags & AMD_ASIC_MASK))
 		supports_atomic = true;