[ACPI] IA64-related ACPI Kconfig fixes

Build issues were mostly in the ACPI=n case -- don't do that.
Select ACPI from IA64_GENERIC.
Add some missing dependencies on ACPI.

Mark BLACKLIST_YEAR and some laptop-only ACPI drivers
as X86-only.  Let me know when you get an IA64 Laptop.

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

drivers/acpi/Kconfig

@@ -107,6 +107,7 @@ config ACPI_BUTTON
 
 config ACPI_VIDEO
 	tristate "Video"
+	depends on X86
 	depends on EXPERIMENTAL
 	default m
 	help
@@ -121,7 +122,7 @@ config ACPI_VIDEO
 config ACPI_HOTKEY
 	tristate "Generic Hotkey"
 	depends on EXPERIMENTAL
-	depends on !IA64_SGI_SN
+	depends on X86
 	default n
 	help
 	  Experimental consolidated hotkey driver.
@@ -250,6 +251,7 @@ config ACPI_CUSTOM_DSDT_FILE
 
 config ACPI_BLACKLIST_YEAR
 	int "Disable ACPI for systems before Jan 1st this year"
+	depends on X86
 	default 0
 	help
 	  enter a 4-digit year, eg. 2001 to disable ACPI by default