ACPI: replace ACPI_DEBUG_PRINT((ACPI_DB_ERROR, ...) with printk

ACPI_DB_ERROR and ACPI_DB_WARN were removed from ACPICA core.
So replace ACPI_DEBUG_PRINT((ACPI_DB_ERROR, ...) with printk(KERN_ERR PREFIX ...)
and ACPI_DEBUG_PRINT((ACPI_DB_WARN, ...) with printk(KERN_WARNING PREFIX ...)

We do not use ACPI_ERROR/ACPI_WARNING since they're not exported, see
-------------------------------------------------------------
commit 6468463abd7051fcc29f3ee7c931f9bbbb26f5a4
Author: Len Brown <len.brown@intel.com>
Date:   Mon Jun 26 23:41:38 2006 -0400

    ACPI: un-export ACPI_ERROR() -- use printk(KERN_ERR...)

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

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
index 2655bc1..dfc0486 100644
--- a/drivers/acpi/fan.c
+++ b/drivers/acpi/fan.c
@@ -327,8 +327,8 @@
 
 	result = acpi_bus_get_power(device->handle, &power_state);
 	if (result) {
-		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-				  "Error reading fan power state\n"));
+		printk(KERN_ERR PREFIX
+				  "Error reading fan power state\n");
 		return result;
 	}