ac/gpu_info: Correct Acturus cu bitmap

ac/gpu_info: Correct Acturus cu bitmap

The cu bitmap in amd gpu info structure is
4x4 size array, and it's usually suitable for Vega
ASICs which has 4*2 SE/SH layout.
But for Arcturus, SE/SH layout is changed to 8*1.
To mostly reduce the impact, we make it compatible
with current bitmap array as below:
	SE4,SH0 --> cu_bitmap[0][1]
	SE5,SH0 --> cu_bitmap[1][1]
	SE6,SH0 --> cu_bitmap[2][1]
	SE7,SH0 --> cu_bitmap[3][1]

Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5212>