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/pxm2_defconfig b/configs/pxm2_defconfig
index 1e3b639..9b5b20f 100644
--- a/configs/pxm2_defconfig
+++ b/configs/pxm2_defconfig
@@ -62,5 +62,6 @@
 CONFIG_G_DNL_MANUFACTURER="Siemens AG"
 CONFIG_G_DNL_VENDOR_NUM=0x0908
 CONFIG_G_DNL_PRODUCT_NUM=0x02d2
+# CONFIG_VIDEO_SW_CURSOR is not set
 CONFIG_SYS_CONSOLE_BG_COL=0xff
 CONFIG_SYS_CONSOLE_FG_COL=0x00