UPSTREAM: GKI: thermal: make device_register's type argument const

...because it can be, the buffer is strlcpy'd into a local buffer in a
thermal struct member.

Signed-off-by: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
(cherry picked from commit f991de53)
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 153738240
Change-Id: I3c9f18f4459890cc2ebcbf9bc6f9e6e3da339dfb