[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/drivers/Makefile b/drivers/Makefile
index 126a851..784b93c 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -8,7 +8,7 @@
 obj-$(CONFIG_PCI)		+= pci/
 obj-$(CONFIG_PARISC)		+= parisc/
 obj-y				+= video/
-obj-$(CONFIG_ACPI_BOOT)		+= acpi/
+obj-$(CONFIG_ACPI)		+= acpi/
 # PnP must come after ACPI since it will eventually need to check if acpi
 # was used and do nothing if so
 obj-$(CONFIG_PNP)		+= pnp/