hwmon: (asus_atk0110) Fix memory leak

[ upstream commit 0b8e77f1 ]

The object returned by atk_gitm is dynamically allocated and must be
freed.

Signed-off-by: Luca Tettamanti <kronos.it@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
Signed-off-by: Andi Kleen <ak@linux.intel.com>