We were using the vddc mask rather than the vddci mask.
Bug:
https://bugzilla.kernel.org/show_bug.cgi?id=79071
Possibly also fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=68571
Noticed-by:  Jonathan Howard <jonathan@unbiased.name>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
 
                table->voltageMaskTable.highMask[RV770_SMC_VOLTAGEMASK_VDDCI] = 0;
                table->voltageMaskTable.lowMask[RV770_SMC_VOLTAGEMASK_VDDCI] =
-                       cpu_to_be32(eg_pi->vddc_voltage_table.mask_low);
+                       cpu_to_be32(eg_pi->vddci_voltage_table.mask_low);
        }
 
        return 0;