drm/amdgpu: correct initial cp_hqd_quantum for gfx9

stable inclusion
from stable-5.10.71
commit 9f382e1edf90ae03be43dbd4976c2a332cd7ce2d
bugzilla: 182981 https://gitee.com/openeuler/kernel/issues/I4I3KD

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9f382e1edf90ae03be43dbd4976c2a332cd7ce2d



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commit 9f52c25f upstream.

didn't read the value of mmCP_HQD_QUANTUM from correct
register offset

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Le Ma <Le.Ma@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by: Weilong Chen <chenweilong@huawei.com>

Signed-off-by: Chen Jun <chenjun102@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>