powerpc-utils: Update URL to new upstream

powerpc-utils changed upstream git repositories again.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 1b383e4bf4151b9232b2e66f0d6ae822546576a5)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/powerpc-utils/Config.in

@@ -10,7 +10,7 @@ config BR2_PACKAGE_POWERPC_UTILS
 	help
 	  System utilities for PowerPC machines.
 
-	  https://github.com/nfont/powerpc-utils
+	  https://github.com/ibm-power-utilities/powerpc-utils.git
 
 if BR2_PACKAGE_POWERPC_UTILS