Don't try to reserve a resource that is already allocated.  If the ECDT table is present, then the acpi_ec(4) driver will allocate its resources from nexus0 before the acpi0 device reserves resources for child devices.
Don't try to reserve a resource that is already allocated.  If the ECDT
table is present, then the acpi_ec(4) driver will allocate its resources
from nexus0 before the acpi0 device reserves resources for child devices.

Reviewed by:	jkim

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