cfg80211: fix CFG82011_CRDA_SUPPORT still mentioning internal regdb

Back with commit c8c240e284 (cfg80211: reg: remove support for
built-in regdb, 2015-10-15), support for using CFG80211_INTERNAL_REGDB
was removed in favor of loading the regulatory database as firmware
file. The documentation of CFG80211_CRDA_SUPPORT was not adjusted,
though, which is why it still mentions mentions the old way of loading
via the internal regulatory database.

Remove it so that the kernel option only mentions using the firmware
file.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Link: https://lore.kernel.org/r/c56e60207fbd0512029de8c6276ee00f73491924.1589732954.git.ps@pks.im
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/Kconfig

@@ -181,8 +181,8 @@ config CFG80211_CRDA_SUPPORT
 	default y
 	help
 	  You should enable this option unless you know for sure you have no
-	  need for it, for example when using internal regdb (above) or the
-	  database loaded as a firmware file.
+	  need for it, for example when using the regulatory database loaded as
+	  a firmware file.
 
 	  If unsure, say Y.