package/open62541: drop spurious space

Drop spurious space added by commit
b36ea68b5ad0f89ffd92cac3f91654e180683b1c

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/open62541/open62541.mk

@@ -27,7 +27,7 @@ OPEN62541_CONF_OPTS += -DUA_NAMESPACE_ZERO=MINIMAL
 else ifeq ($(BR2_PACKAGE_OPEN62541_UA_NAMESPACE_ZERO_REDUCED),y)
 OPEN62541_CONF_OPTS += -DUA_NAMESPACE_ZERO=REDUCED
 else ifeq ($(BR2_PACKAGE_OPEN62541_UA_NAMESPACE_ZERO_FULL),y)
-OPEN62541_CONF_OPTS +=  -DUA_NAMESPACE_ZERO=FULL
+OPEN62541_CONF_OPTS += -DUA_NAMESPACE_ZERO=FULL
 endif
 
 ifeq ($(BR2_PACKAGE_OPEN62541_JSON_ENCODING),y)