thermal: fix lockdep splat from qcom driver

The attribute dynamically allocated should be initialized
with sysfs_attr_init. Otherwise, lockdep slaps us.

Bug: 122096541
Bug: 123720375
Change-Id: I5f8aa327729fb51b955b148b7fb5dc0f85d3fbbb
Signed-off-by: Minchan Kim <minchan@google.com>
Signed-off-by: Miguel de Dios <migueldedios@google.com>
Signed-off-by: Alexander Winkowski <dereference23@outlook.com>