Revert "drm/amdgpu: change SH MEM alignment mode for gfx10"

This reverts commit b74fb888

.
Revert the auto alignment mode set of SH MEM config, as it will result
to OCL Conformance Test fail.

Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>