video: Rename CONFIG_DM_VIDEO to CONFIG_VIDEO

Now that all the old code is gone, rename this option. Driver model
migration is now complete.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/starqltechn_defconfig b/configs/starqltechn_defconfig
index 4f84f5f..7955076 100644
--- a/configs/starqltechn_defconfig
+++ b/configs/starqltechn_defconfig
@@ -29,7 +29,7 @@
 CONFIG_PMIC_QCOM=y
 # CONFIG_REQUIRE_SERIAL_CONSOLE is not set
 CONFIG_SPMI_MSM=y
-CONFIG_DM_VIDEO=y
+CONFIG_VIDEO=y
 CONFIG_SYS_WHITE_ON_BLACK=y
 CONFIG_VIDEO_SIMPLE=y
 CONFIG_VIDEO_DT_SIMPLEFB=y