ACPI: acpi_os_allocate() fixes

Replace acpi_in_resume with a more general hack
to check irqs_disabled() on any kmalloc() from ACPI.
While setting (system_state != SYSTEM_RUNNING) on resume
seemed more general, Andrew Morton preferred this approach.

http://bugzilla.kernel.org/show_bug.cgi?id=3469

Make acpi_os_allocate() into an inline function to
allow /proc/slab_allocators to work.

Delete some memset() that could fault on allocation failure.

Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/utilities/utalloc.c

@@ -285,6 +285,7 @@ acpi_ut_initialize_buffer(struct acpi_buffer * buffer,
 	return (status);
 }
 
+#ifdef NOT_USED_BY_LINUX
 /*******************************************************************************
  *
  * FUNCTION:    acpi_ut_allocate
@@ -360,3 +361,4 @@ void *acpi_ut_allocate_zeroed(acpi_size size,
 
 	return (allocation);
 }
+#endif