postgresql: disable spinlocks on openrisc

Just like all non-mainstream architectures, postgresql doesn't provide
its internal spinlock implementation on OpenRISC, so disable it.

Fixes:

  http://autobuild.buildroot.net/results/e9de750e34f10c4a2403696936260ad1547d0d15/

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/postgresql/postgresql.mk

@@ -29,7 +29,7 @@ ifneq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
 POSTGRESQL_CONF_OPTS += --disable-thread-safety
 endif
 
-ifeq ($(BR2_arcle)$(BR2_arceb)$(BR2_microblazeel)$(BR2_microblazebe)$(BR2_nios2)$(BR2_xtensa),y)
+ifeq ($(BR2_arcle)$(BR2_arceb)$(BR2_microblazeel)$(BR2_microblazebe)$(BR2_or1k)$(BR2_nios2)$(BR2_xtensa),y)
 POSTGRESQL_CONF_OPTS += --disable-spinlocks
 endif