[PATCH -next] drm: fix nouveau_acpi build

[Randy Dunlap]

From: Randy Dunlap <randy.dunlap at oracle.com>

Fix build errors when CONFIG_ACPI is enabled but MXM_WMI is not enabled
by selecting both MXM_WMI and ACPI_WMI (the latter just for kconfig
dependencies):

nouveau_acpi.c:(.text+0x2400c8): undefined reference to `mxm_wmi_call_mxmx'
nouveau_acpi.c:(.text+0x2400cf): undefined reference to `mxm_wmi_call_mxds'
nouveau_acpi.c:(.text+0x2400fe): undefined reference to `mxm_wmi_call_mxmx'
nouveau_acpi.c:(.text+0x2402ba): undefined reference to `mxm_wmi_supported

Signed-off-by: Randy Dunlap <randy.dunlap at oracle.com>
---
 drivers/gpu/drm/nouveau/Kconfig |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- linux-next-20110511.orig/drivers/gpu/drm/nouveau/Kconfig
+++ linux-next-20110511/drivers/gpu/drm/nouveau/Kconfig
@@ -11,7 +11,8 @@ config DRM_NOUVEAU
 	select FRAMEBUFFER_CONSOLE if !EXPERT
 	select FB_BACKLIGHT if DRM_NOUVEAU_BACKLIGHT
 	select ACPI_VIDEO if ACPI && X86 && BACKLIGHT_CLASS_DEVICE && VIDEO_OUTPUT_CONTROL && INPUT
-	select MXM_WMI if ACPI && ACPI_WMI
+	select ACPI_WMI if ACPI
+	select MXM_WMI if ACPI
 	help
 	  Choose this option for open-source nVidia support.