[ACPI] delete CONFIG_ACPI_BOOT

it has been a synonym for CONFIG_ACPI since 2.6.12

Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 84f89da..1f5c26d 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -384,7 +384,7 @@
 	if (early_console_setup(*cmdline_p) == 0)
 		mark_bsp_online();
 
-#ifdef CONFIG_ACPI_BOOT
+#ifdef CONFIG_ACPI
 	/* Initialize the ACPI boot-time table parser */
 	acpi_table_init();
 # ifdef CONFIG_ACPI_NUMA
@@ -420,7 +420,7 @@
 
 	cpu_init();	/* initialize the bootstrap CPU */
 
-#ifdef CONFIG_ACPI_BOOT
+#ifdef CONFIG_ACPI
 	acpi_boot_init();
 #endif