staging: rtl8192e: Add missing entry CFG80211 in Kconfig

staging: rtl8192e: Add missing entry CFG80211 in Kconfig

Add missing entry CFG80211 in Kconfig to ensure that CFG80211 is
available when selecting hardware rtl8192e.

Fixes: d88b46ce5ab8 ("staging: rtl8192e: Add cfg80211.h and remove defined variables")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202306180620.Ew55XtKJ-lkp@intel.com/
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20230618194454.GA10653@matrix-ESPRIMO-P710
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>