drm/amdgpu/gfx10: Delete some duplicated argument to '|'

1. gfx_v10_0_soft_reset GRBM_STATUS__SPI_BUSY_MASK
2. gfx_v10_0_update_gfx_clock_gating AMD_CG_SUPPORT_GFX_CGLS

Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Ye Bin <yebin10@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>