open2300: use $(TARGET_MAKE_ENV) when calling $(MAKE)

Signed-off-by: Gustavo Zacarias <gustavo.zacarias@free-electrons.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/open2300/open2300.mk

@@ -28,7 +28,7 @@ endif
 endif
 
 define OPEN2300_BUILD_CMDS
-	$(MAKE) CC="$(TARGET_CC)" LD="$(TARGET_LD)" \
+	$(TARGET_MAKE_ENV) $(MAKE) CC="$(TARGET_CC)" LD="$(TARGET_LD)" \
 		CFLAGS="$(OPEN2300_CFLAGS)" CC_LDFLAGS="$(OPEN2300_LDFLAGS)" \
 		-C $(@D) $(OPEN2300_BINS)
 endef