drm/radeon: fix typo in Makefile

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/Makefile

@@ -63,6 +63,6 @@ radeon-y += radeon_device.o radeon_kms.o \
 	evergreen.o
 
 radeon-$(CONFIG_COMPAT) += radeon_ioc32.o
-radeon-$(CONFIG_VGA_SWITCHEROO) += radone_atpx_handler.o
+radeon-$(CONFIG_VGA_SWITCHEROO) += radeon_atpx_handler.o
 
 obj-$(CONFIG_DRM_RADEON)+= radeon.o