video: lcd: Add CONFIG_SPLASH_SCREEN_PREPARE support to CONFIG_VIDEO

Create splash.c/h to put the function and any future common splash
screen code in.

Signed-off-by: Robert Winkler <robert.winkler@boundarydevices.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
diff --git a/common/lcd.c b/common/lcd.c
index c9a589e..95006aa 100644
--- a/common/lcd.c
+++ b/common/lcd.c
@@ -43,6 +43,8 @@
 #include <lcd.h>
 #include <watchdog.h>
 
+#include <splash.h>
+
 #if defined(CONFIG_CPU_PXA25X) || defined(CONFIG_CPU_PXA27X) || \
 	defined(CONFIG_CPU_MONAHANS)
 #define CONFIG_CPU_PXA
@@ -1072,18 +1074,6 @@
 }
 #endif
 
-#ifdef CONFIG_SPLASH_SCREEN_PREPARE
-static inline int splash_screen_prepare(void)
-{
-	return board_splash_screen_prepare();
-}
-#else
-static inline int splash_screen_prepare(void)
-{
-	return 0;
-}
-#endif
-
 static void *lcd_logo(void)
 {
 #ifdef CONFIG_SPLASH_SCREEN
@@ -1096,7 +1086,7 @@
 		do_splash = 0;
 
 		if (splash_screen_prepare())
-			return (void *)gd->fb_base;
+			return (void *)lcd_base;
 
 		addr = simple_strtoul (s, NULL, 16);
 #ifdef CONFIG_SPLASH_SCREEN_ALIGN