thinkpad-acpi: wrong thermal attribute_group removed in thermal_exit()

sysfs_remove_group() removed the wrong attribute_group for
thermal_read_mode TPEC_8, ACPI_TMP07 and ACPI_UPDT

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Henrique de Moraes Holschuh <ibm-acpi@hmh.eng.br>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index e67e4fe..eb603f1d5 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -5771,7 +5771,7 @@
 	case TPACPI_THERMAL_ACPI_TMP07:
 	case TPACPI_THERMAL_ACPI_UPDT:
 		sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
-				   &thermal_temp_input16_group);
+				   &thermal_temp_input8_group);
 		break;
 	case TPACPI_THERMAL_NONE:
 	default: