lcd, mpc8xx: move the mpc8xx driver to drivers/video

Since the lcd code was compiled unconditionally in arch also
add CONFIG_MPC8XX_LCD to the boards using this driver.

cc: Anatolij Gustschin <agust@denx.de>
cc: Wolfgang Denk <wd@denx.de>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>
diff --git a/include/configs/RBC823.h b/include/configs/RBC823.h
index b042c67..d4bcc62 100644
--- a/include/configs/RBC823.h
+++ b/include/configs/RBC823.h
@@ -47,6 +47,7 @@
 #endif
 #define CONFIG_KEYBOARD		1	/* This board has a custom keybpard */
 #define CONFIG_LCD		1	/* use LCD controller ...	*/
+#define CONFIG_MPC8XX_LCD
 #define CONFIG_HITACHI_SP19X001_Z1A	/* The LCD type we use */
 
 #define	CONFIG_8xx_CONS_SMC2	1	/* Console is on SMC2		*/