drm/amd/pm: Fix output of pp_od_clk_voltage

Printing the other clock types should not be conditioned on being able
to print OD_SCLK. Some GPUs currently have limited capability of only
printing a subset of these.

Since this condition was introduced in v5.18-rc1, reading from
`pp_od_clk_voltage` has been returning empty on the Asus ROG Strix G15
(2021).

Fixes: 79c65f3f ("drm/amd/pm: do not expose power implementation details to amdgpu_pm.c")
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Jonatas Esteves <jntesteves@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

drivers/gpu/drm/amd/pm/amdgpu_pm.c

@@ -871,14 +871,12 @@ static ssize_t amdgpu_get_pp_od_clk_voltage(struct device *dev,
 	}
 	if (ret == -ENOENT) {
 		size = amdgpu_dpm_print_clock_levels(adev, OD_SCLK, buf);
-		if (size > 0) {
 		size += amdgpu_dpm_print_clock_levels(adev, OD_MCLK, buf + size);
 		size += amdgpu_dpm_print_clock_levels(adev, OD_VDDC_CURVE, buf + size);
 		size += amdgpu_dpm_print_clock_levels(adev, OD_VDDGFX_OFFSET, buf + size);
 		size += amdgpu_dpm_print_clock_levels(adev, OD_RANGE, buf + size);
 		size += amdgpu_dpm_print_clock_levels(adev, OD_CCLK, buf + size);
 	}
-	}
 
 	if (size == 0)
 		size = sysfs_emit(buf, "\n");