In order for the old DTBs to continue working, the new interrupt code
must not return an error if interrupts are not defined. Don't return an
error in case of -ENXIO.

Fixes: 634e11d5 ("drivers: thermal: tsens: Add interrupt support")
Suggested-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/cea3317c5d793db312064d68b261ad420a4a81b1.1576146898.git.amit.kucheria@linaro.org