ACPI: thinkpad-acpi: add debug mode

Add a debug mode parameter and verbose debug mode Kconfig option.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 2cd96a3..44e4c8f 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -137,6 +137,16 @@
 
 	  If you have an IBM or Lenovo ThinkPad laptop, say Y or M here.
 
+config THINKPAD_ACPI_DEBUG
+	bool "Verbose debug mode"
+	depends on THINKPAD_ACPI
+	default n
+	---help---
+	  Enables extra debugging information, at the expense of a slightly
+	  increase in driver size.
+
+	  If you are not sure, say N here.
+
 config THINKPAD_ACPI_DOCK
 	bool "Legacy Docking Station Support"
 	depends on THINKPAD_ACPI