staging: ti-soc-thermal: rename Kconfig options

This patch renames the Kconfig options to cope with
the new naming convention.

Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Benoit <b-cousson@ti.com>
Cc: Nishanth Menon <nm@ti.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>