• Only create the led(4) interface, if setting the thinklight is possible
• Initialize val_ec with the content of the volume EC register for ACPI_IBM_METHOD_VOLUME and ACPI_IBM_METHOD_MUTE in acpi_ibm_sysctl_set() if there is no CMOS handle present. This fixes setting volume and mute on such models.

Submitted by: ru
Approved by: philip