hwloc: fix condition to display comment message in menuconfig

The comment message shows up if the toolchain has threads instead
of not having threads.

Signed-off-by: Florent Valette <florent.valette@gmail.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/hwloc/Config.in

@@ -12,4 +12,4 @@ config BR2_PACKAGE_HWLOC
 	  http://www.open-mpi.org/projects/hwloc/
 
 comment "hwloc needs a toolchain w/ threads"
-	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on !BR2_TOOLCHAIN_HAS_THREADS