kconfig: qconf: update the intro message to match to the current code

I do not think "Although there is no cross reference yet ..." is valid
any longer.

The cross reference is supported via hyperlinks enabled by the
"show Debug Info" option.

Update the message.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>

scripts/kconfig/qconf.cc

@@ -1846,10 +1846,10 @@ void ConfigMainWindow::showIntro(void)
 		"\n"
 		"If you do not see an option (e.g., a device driver) that you "
 		"believe should be present, try turning on Show All Options "
-		"under the Options menu. Although there is no cross reference "
-		"yet to help you figure out what other options must be enabled "
-		"to support the option you are interested in, you can still "
-		"view the help of a grayed-out option.\n"
+		"under the Options menu. Enabling Show Debug Info will help you"
+		"figure out what other options must be enabled to support the "
+		"option you are interested in, and hyperlinks will navigate to "
+		"them.\n"
 		"\n"
 		"Toggling Show Debug Info under the Options menu will show the "
 		"dependencies, which you can then match by examining other "