backlight: Rename the corgi backlight driver to generic

The corgi backlight driver is really generic code. This rename makes
this a lot clearer and completes the partial rename made a while ago.

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 103427d..363b3cb 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -11,7 +11,7 @@
 
 obj-$(CONFIG_BACKLIGHT_CLASS_DEVICE) += backlight.o
 obj-$(CONFIG_BACKLIGHT_ATMEL_PWM)    += atmel-pwm-bl.o
-obj-$(CONFIG_BACKLIGHT_CORGI)	+= corgi_bl.o
+obj-$(CONFIG_BACKLIGHT_GENERIC)	+= generic_bl.o
 obj-$(CONFIG_BACKLIGHT_HP680)	+= hp680_bl.o
 obj-$(CONFIG_BACKLIGHT_LOCOMO)	+= locomolcd.o
 obj-$(CONFIG_BACKLIGHT_OMAP1)	+= omap1_bl.o