platform: msm_shared: Enable compilation of gpio driver

Enable gpio driver in msm_shared to be compiled for 8x10
target.

Change-Id: If44d728b9649d36430f1ce0ff5643e760d648d34
diff --git a/platform/msm_shared/rules.mk b/platform/msm_shared/rules.mk
index 1fec96b..f43f1f6 100755
--- a/platform/msm_shared/rules.mk
+++ b/platform/msm_shared/rules.mk
@@ -165,7 +165,8 @@
             $(LOCAL_DIR)/spmi.o \
             $(LOCAL_DIR)/bam.o \
             $(LOCAL_DIR)/qpic_nand.o \
-            $(LOCAL_DIR)/dev_tree.o
+            $(LOCAL_DIR)/dev_tree.o \
+            $(LOCAL_DIR)/gpio.o
 endif
 
 ifeq ($(PLATFORM),msm7x27a)