libata-acpi: don't call sleeping function from invalid context

The problem is introduced by commit
664d080c41463570b95717b5ad86e79dc1be0877.

acpi_evaluate_integer is a sleeping function,
and it should not be called with spin_lock_irqsave.
https://bugzilla.redhat.com/show_bug.cgi?id=451399

Signed-off-by: Zhang Rui <[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>
1 file changed