ACPI / processor: initialize a variable to silence compiler warning

In acpi_processor_resume(), the variable resumed_bm_rld is being
used without being initialized, so initialize it.
Signed-off-by: NAl Stone <al.stone@linaro.org>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/processor_idle.c

@@ -211,7 +211,7 @@ static int acpi_processor_suspend(void)
 
 static void acpi_processor_resume(void)
 {
-	u32 resumed_bm_rld;
+	u32 resumed_bm_rld = 0;
 
 	acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld);
 	if (resumed_bm_rld == saved_bm_rld)