Add support for AMD iGPUs

[9cb14c1ec0]

Remove some restrictions that prevent successful use of AMD iGPUs. This has been tested on a AMD Ryzen 7 PRO 5850U

[basxto]

Are you sure these changes are required?

With my Sapphire Nitro+ Radeon RX 580 I still get:

amdgpu too old gfx803
no compatible amdgpu devices detected

But the Vulkan part works because it's independent of it. If upstream Ollama changes its mind that could lead to conflicts with ROCm support.

The changes in discover/amd_linux.go should be irrelevant for Vulkan and IGPUMemLimit is also only used in discover/amd_linux.go and discover/amd_windows.go as far as I can tell.

[9cb14c1ec0]

Are you sure these changes are required?

With my Sapphire Nitro+ Radeon RX 580 I still get:

amdgpu too old gfx803
no compatible amdgpu devices detected

But the Vulkan part works because it's independent of it. If upstream Ollama changes its mind that could lead to conflicts with ROCm support.

The changes in discover/amd_linux.go should be irrelevant for Vulkan and IGPUMemLimit is also only used in discover/amd_linux.go and discover/amd_windows.go as far as I can tell.

That was the change that made the difference for me between using CPU and iGPU.