copper: Enable UART and USB drivers.

Change-Id: I07425290fc603440e5016c878d9b75862ab543df
diff --git a/platform/copper/rules.mk b/platform/copper/rules.mk
index 8b6a0f1..5e0c78a 100644
--- a/platform/copper/rules.mk
+++ b/platform/copper/rules.mk
@@ -8,6 +8,7 @@
 
 MMC_SLOT         := 1
 
+DEFINES += PERIPH_BLK_BLSP=1 
 DEFINES += WITH_CPU_EARLY_INIT=0 WITH_CPU_WARM_BOOT=0 \
 	   MMC_SLOT=$(MMC_SLOT)
 
@@ -15,7 +16,8 @@
 
 OBJS += \
 	$(LOCAL_DIR)/platform.o \
-	$(LOCAL_DIR)/acpuclock.o
+	$(LOCAL_DIR)/acpuclock.o \
+	$(LOCAL_DIR)/gpio.o
 
 LINKER_SCRIPT += $(BUILDDIR)/system-onesegment.ld