acpi: simplify module_param namespace

Rather than overriding MODULE_PARAM_PREFIX, build via acpi.o so
KBUILD_MODNAME is set to "acpi".

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
 drivers/acpi/Makefile |    9 ++++++---
 drivers/acpi/system.c |    4 ----
 2 files changed, 6 insertions(+), 7 deletions(-)

diff -r 79f0d024aebc drivers/acpi/Makefile
--- a/drivers/acpi/Makefile	Fri Aug 15 11:23:34 2008 +1000
+++ b/drivers/acpi/Makefile	Sat Aug 16 15:55:10 2008 +1000
@@ -21,10 +21,15 @@ obj-$(CONFIG_X86)		+= blacklist.o
 #
 # ACPI Core Subsystem (Interpreter)
 #
-obj-y				+= osl.o utils.o reboot.o\
+obj-y				+= acpi.o \
 				   dispatcher/ events/ executer/ hardware/ \
 				   namespace/ parser/ resources/ tables/ \
 				   utilities/
+
+# "acpi." module_param namespace.
+acpi-y				+= osl.o utils.o reboot.o 
+acpi-$(CONFIG_ACPI_POWER)	+= power.o
+acpi-$(CONFIG_ACPI_SYSTEM)	+= system.o event.o
 
 #
 # ACPI Bus and Device Drivers
@@ -49,11 +54,9 @@ obj-$(CONFIG_ACPI_VIDEO)	+= video.o
 obj-$(CONFIG_ACPI_VIDEO)	+= video.o
 obj-y				+= pci_root.o pci_link.o pci_irq.o pci_bind.o
 obj-$(CONFIG_ACPI_PCI_SLOT)	+= pci_slot.o
-obj-$(CONFIG_ACPI_POWER)	+= power.o
 obj-$(CONFIG_ACPI_PROCESSOR)	+= processor.o
 obj-$(CONFIG_ACPI_CONTAINER)	+= container.o
 obj-$(CONFIG_ACPI_THERMAL)	+= thermal.o
-obj-$(CONFIG_ACPI_SYSTEM)	+= system.o event.o
 obj-$(CONFIG_ACPI_DEBUG)	+= debug.o
 obj-$(CONFIG_ACPI_NUMA)		+= numa.o
 obj-$(CONFIG_ACPI_WMI)		+= wmi.o
diff -r 79f0d024aebc drivers/acpi/system.c
--- a/drivers/acpi/system.c	Fri Aug 15 11:23:34 2008 +1000
+++ b/drivers/acpi/system.c	Sat Aug 16 15:55:10 2008 +1000
@@ -33,10 +33,6 @@
 
 #define _COMPONENT		ACPI_SYSTEM_COMPONENT
 ACPI_MODULE_NAME("system");
-#ifdef MODULE_PARAM_PREFIX
-#undef MODULE_PARAM_PREFIX
-#endif
-#define MODULE_PARAM_PREFIX "acpi."
 
 #define ACPI_SYSTEM_CLASS		"system"
 #define ACPI_SYSTEM_DEVICE_NAME		"System"