thermal: da9062-thermal: Drop redundant error message

Since platform_get_irq() already prints an error message on failure, it
is not necessary to print another one for the same purpose.

Signed-off-by: zhaoxiao <zhaoxiao@uniontech.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>