amdgpu: enlarge the maximum number of cards supported

128 is the maximum number of cards that the kernel can support
at the moment.

Change-Id: I155b7b21635306d8ecc440b85fb8954501ab5599
Signed-off-by: Xiaojie Yuan <Xiaojie.Yuan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
1 file changed