package/mpd: fix typo

Fix little type: it's UPnP, not UPnp.

Signed-off-by: Jörg Krause <jkrause@posteo.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/mpd/Config.in

@@ -279,7 +279,7 @@ config BR2_PACKAGE_MPD_TCP
 	  on different machines (the usual scenario).
 
 config BR2_PACKAGE_MPD_UPNP
-	bool "UPnp"
+	bool "UPnP"
 	select BR2_PACKAGE_EXPAT
 	select BR2_PACKAGE_LIBUPNP
 	help