platform/x86: thinkpad_acpi: do not report thermal sensor state for tablet mode switch

We should not do a thermal sensors state dump to the kernel log just
because the laptop is reporting that it changed into or out of tablet
mode.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Tested-by: Jordan Glover <Golden_Miller83@protonmail.ch>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>