Convert CONFIG_VIDEO_SW_CURSOR to Kconfig

This converts the following to Kconfig:
   CONFIG_VIDEO_SW_CURSOR

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
[trini: Re-convert, find all the cases where this is off]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/mcx_defconfig b/configs/mcx_defconfig
index 248c18d..9dc3c5a 100644
--- a/configs/mcx_defconfig
+++ b/configs/mcx_defconfig
@@ -32,4 +32,5 @@
 CONFIG_USB_ULPI_VIEWPORT_OMAP=y
 CONFIG_USB_ULPI=y
 CONFIG_USB_STORAGE=y
+# CONFIG_VIDEO_SW_CURSOR is not set
 CONFIG_OF_LIBFDT=y