qt: dbus module doesn't depend on gui support

Seems I somehow got this wrong back in December (bff5248202).

At the same time fix a typo in the comment.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/qt/Config.in

@@ -285,8 +285,9 @@ config BR2_PACKAGE_QT_PHONON_BACKEND
 	help
 	  Build the platform Phonon plugin.
 	  If unsure, say n.
+endif
 
-comment "Qt DBbus module not available (need dbus)"
+comment "Qt Dbus module not available (needs dbus)"
 	depends on !BR2_PACKAGE_DBUS
 
 config BR2_PACKAGE_QT_DBUS
@@ -294,7 +295,6 @@ config BR2_PACKAGE_QT_DBUS
 	depends on BR2_PACKAGE_DBUS
 	help
 	  Build the Qt DBus module.
-endif
 
 config BR2_PACKAGE_QT_XML
 	bool "XML Module"