ACPI: ibm-acpi: make non-generic bay support optional

This patch makes it possible to disable ibm-acpi non-generic bay support,
as generic bay support already works well for a number of ThinkPads.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 59f9def..6f8c50e 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -224,6 +224,17 @@
 
 	  If you are not sure, say N here.
 
+config ACPI_IBM_BAY
+	bool "Legacy Removable Bay Support"
+	depends on ACPI_IBM
+	depends on ACPI_BAY=n
+	default n
+	---help---
+	  Allows the ibm_acpi driver to handle removable bays.
+	  This support is obsoleted by CONFIG_ACPI_BAY.
+
+	  If you are not sure, say N here.
+
 config ACPI_TOSHIBA
 	tristate "Toshiba Laptop Extras"
 	depends on X86