ACPI: make CONFIG_ACPI_SLEEP _not_ dependent on CONFIG_SOFTWARE_SUSPEND

and add help text.

drivers/acpi/Config.help

@@ -86,6 +86,23 @@ CONFIG_ACPI_SYSTEM
   This driver will enable your system to shut down using ACPI, and
   dump your ACPI DSDT table using /proc/acpi/dsdt.
 
+CONFIG_ACPI_SLEEP
+  This option adds support for ACPI suspend states. 
+
+  With this option, you will be able to put the system "to sleep". 
+  Sleep states are low power states for the system and devices. All
+  of the system operating state is saved to either memory or disk
+  (depending on the state), to allow the system to resume operation
+  quickly at your request.
+
+  Although this option sounds really nifty, barely any of the device
+  drivers have been converted to the new driver model and hence few
+  have proper power management support. 
+
+  This option is not recommended for anyone except those doing driver
+  power management development.
+
+
 CONFIG_ACPI_DEBUG
   The ACPI driver can optionally report errors with a great deal
   of verbosity. Saying Y enables these statements. This will increase

drivers/acpi/Config.in

@@ -13,8 +13,10 @@ if [ "$CONFIG_X86" = "y" ]; then
       fi
 
       define_bool CONFIG_ACPI_BOOT y
+      define_bool CONFIG_ACPI_SLEEP n
 
       if [ "$CONFIG_ACPI_HT_ONLY" != "y" ]; then
+	 bool     '  Sleep States' CONFIG_ACPI_SLEEP
          tristate '  AC Adapter' CONFIG_ACPI_AC
          tristate '  Battery' CONFIG_ACPI_BATTERY
          tristate '  Button' CONFIG_ACPI_BUTTON
@@ -33,7 +35,6 @@ if [ "$CONFIG_X86" = "y" ]; then
          define_bool CONFIG_ACPI_EC y
          define_bool CONFIG_ACPI_POWER y
          define_bool CONFIG_ACPI_PCI $CONFIG_PCI
-         define_bool CONFIG_ACPI_SLEEP $CONFIG_SOFTWARE_SUSPEND
          define_bool CONFIG_ACPI_SYSTEM	y
       fi
    fi
@@ -49,6 +50,7 @@ if [ "$CONFIG_IA64" = "y" ]; then
       define_bool CONFIG_ACPI_PCI n
       define_bool CONFIG_ACPI_POWER n
       define_bool CONFIG_ACPI_SYSTEM n
+      define_bool CONFIG_ACPI_SLEEP n
       define_bool CONFIG_ACPI_BUTTON n
       define_bool CONFIG_ACPI_FAN n
       define_bool CONFIG_ACPI_PROCESSOR n