[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/i386/kernel/Makefile b/arch/i386/kernel/Makefile
index 4cc83b3..c52b4fa 100644
--- a/arch/i386/kernel/Makefile
+++ b/arch/i386/kernel/Makefile
@@ -11,7 +11,7 @@
 
 obj-y				+= cpu/
 obj-y				+= timers/
-obj-$(CONFIG_ACPI_BOOT)		+= acpi/
+obj-$(CONFIG_ACPI)		+= acpi/
 obj-$(CONFIG_X86_BIOS_REBOOT)	+= reboot.o
 obj-$(CONFIG_MCA)		+= mca.o
 obj-$(CONFIG_X86_MSR)		+= msr.o