ARM: bcm: NSP: Removed forced thermal selection

Both THERMAL and THERMAL_OF are user-selectable and we should not force
the selection of those Kconfig entries.

Link: https://lore.kernel.org/r/20220711222919.4048833-1-f.fainelli@gmail.com


Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>