platform: msm_shared: Change target name from zirc to 9640

Add support for renaming zirc to 9640

Change-Id: I8c5433d60b63b5a8fed25bfef5246288cc616431
diff --git a/platform/msm_shared/rules.mk b/platform/msm_shared/rules.mk
index c905e23..cbc89f3 100755
--- a/platform/msm_shared/rules.mk
+++ b/platform/msm_shared/rules.mk
@@ -348,7 +348,7 @@
 			$(LOCAL_DIR)/qpic_panel.o
 endif
 
-ifeq ($(PLATFORM),msmzirc)
+ifeq ($(PLATFORM),mdm9640)
 	OBJS += $(LOCAL_DIR)/qgic.o \
 			$(LOCAL_DIR)/uart_dm.o \
 			$(LOCAL_DIR)/interrupts.o \