postgresql: disable spinlock support for nios2

Fixes:
	http://autobuild.buildroot.net/results/4d2/4d2f962ae59cfe11fce4d6790dbccfbb527a8f5f/

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/postgresql/postgresql.mk

@@ -16,7 +16,7 @@ ifneq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
 	POSTGRESQL_CONF_OPT += --disable-thread-safety
 endif
 
-ifeq ($(BR2_microblazeel)$(BR2_microblazebe),y)
+ifeq ($(BR2_microblazeel)$(BR2_microblazebe)$(BR2_nios2),y)
 	POSTGRESQL_CONF_OPT += --disable-spinlocks
 endif