Nokia RX-51: Convert to CONFIG_DM_VIDEO

Mechanically convert video_hw_init() function to UCLASS_VIDEO probe
callback and replace CONFIG_CFB_CONSOLE by CONFIG_DM_VIDEO.

As framebuffer base address is setup by the bootloader which loads U-Boot,
set plat->base to that fixed framebuffer address.

This change was tested in qemu n900 machine and is working fine.

What does not work is CONFIG_VIDEO_LOGO, seems to be buggy.

Signed-off-by: Pali Rohár <pali@kernel.org>
diff --git a/configs/nokia_rx51_defconfig b/configs/nokia_rx51_defconfig
index 47b7bc3..1d64981 100644
--- a/configs/nokia_rx51_defconfig
+++ b/configs/nokia_rx51_defconfig
@@ -77,8 +77,11 @@
 CONFIG_USB=y
 CONFIG_USB_MUSB_UDC=y
 CONFIG_USB_OMAP3=y
-CONFIG_CFB_CONSOLE=y
-CONFIG_CFB_CONSOLE_ANSI=y
+CONFIG_DM_VIDEO=y
+CONFIG_VIDEO_LOGO=y
+# CONFIG_VIDEO_BPP8 is not set
+# CONFIG_VIDEO_BPP32 is not set
+CONFIG_SYS_WHITE_ON_BLACK=y
 CONFIG_SPLASH_SCREEN=y
 CONFIG_WATCHDOG_TIMEOUT_MSECS=31000
 CONFIG_WDT=y