video: kconfig: Fix a typo in SPL_VIDEO_REMOVE

Add one space between 'before' and 'loading'.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 2a37d02..69f4809 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1115,7 +1115,7 @@
 	bool "Remove video driver after SPL stage"
 	help
 	  if this  option is enabled video driver will be removed at the end of
-	  SPL stage, beforeloading the next stage.
+	  SPL stage, before loading the next stage.
 
 if SPL_SPLASH_SCREEN