staging: rtl8192u: Provide a TODO file for this driver

Provide a TODO file that lists the tasks that should be carried out in
order to move this driver off drivers/staging. It's missing from original
addition of this driver.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Link: https://lore.kernel.org/r/20221016110743.1448067-1-pbrobinson@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/TODO

+To-do list:
+
+* Correct the coding style according to Linux guidelines; please read the document
+  at https://www.kernel.org/doc/html/latest/process/coding-style.html.
+* Remove unnecessary debugging/printing macros; for those that are still needed
+  use the proper kernel API (pr_debug(), dev_dbg(), netdev_dbg()).
+* Remove dead code such as unusued functions, variables, fields, etc..
+* Use in-kernel API and remove unnecessary wrappers where possible.
+* Fix bugs due to code that sleeps in atomic context.
+* Remove the HAL layer and migrate its functionality into the relevant parts of
+  the driver.
+* Switch to use LIB80211.
+* Switch to use MAC80211.
+* Switch to use CFG80211.
+* Improve the error handling of various functions, particularly those that use
+  existing kernel APIs.