ACPI: LPSS: Remove nested ifdeffery for CONFIG_PM

There is no need to have the ifdef CONFIG_PM to be nested.
The second and so on will obviously become a no-op.

Remove redundant nested ifdeffery.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: andy-shev

drivers/acpi/acpi_lpss.c

@@ -887,10 +887,8 @@ static int acpi_lpss_activate(struct device *dev)
 	if (pdata->dev_desc->flags & (LPSS_SAVE_CTX | LPSS_SAVE_CTX_ONCE))
 		lpss_deassert_reset(pdata);
 
-#ifdef CONFIG_PM
 	if (pdata->dev_desc->flags & LPSS_SAVE_CTX_ONCE)
 		acpi_lpss_save_ctx(dev, pdata);
-#endif
 
 	return 0;
 }