drm/amd/amdgpu: Add SQ_DEBUG_STS_GLOBAL* registers/bits

Even though they are technically MMIO registers I put the bits with the sqind block
for organizational purposes.

Requested for UMR debugging.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>