rpm: needs XML support in libneon

RPM-5.2.0 needs the optional XML support in libneon.

Restructure kconfig dependencies to ensure rpm can only be selected
if libneon with XML support (in addition to SSL + ZLIB) is enabled.

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

package/rpm/Config.in

@@ -1,12 +1,14 @@
+comment "rpm requires libneon with SSL, XML and ZLIB support"
+	depends on !BR2_PACKAGE_NEON || BR2_PACKAGE_NEON_NOXML
+
 config BR2_PACKAGE_RPM
 	bool "rpm"
 	select BR2_PACKAGE_BEECRYPT
 	select BR2_PACKAGE_POPT
 	select BR2_PACKAGE_OPENSSL
-	select BR2_PACKAGE_NEON
+	depends on BR2_PACKAGE_NEON
+	depends on !BR2_PACKAGE_NEON_NOXML
 	select BR2_PACKAGE_NEON_ZLIB
-	select BR2_PACKAGE_NEON_EXPAT if BR2_PACKAGE_EXPAT
-	select BR2_PACKAGE_NEON_LIBXML2 if BR2_PACKAGE_LIBXML2
 	select BR2_PACKAGE_NEON_SSL
 	help
 	  The RPM package management system.