platform/x86/intel: power-domains: Fix error code in tpmi_init()

Return -ENOMEM instead of success if kcalloc() fails.

Fixes: e37be5d8 ("platform/x86/intel: power-domains: Add interface to get Linux die ID")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/aEKvIGCt6d8Gcx4S@stanley.mountain


Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>