drm/amdgpu/pm: Remove the duplicate dpm status check

Since the smu firmware has fixed the issue that described in the commit 60d61f4e


("drm/amdgpu/pm: fix the Stable pstate Test in amdgpu_test").
So we only need keep dpm status check in the funciton - smu_v13_0_5_set_soft_freq_limited_range.

Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Reviewed-by: Yifan Zhang <yifan1.zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>