gpu: ion: Add platform driver for msm ion

Add platform driver for msm specific ion devices

Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
diff --git a/drivers/gpu/ion/Makefile b/drivers/gpu/ion/Makefile
index 73fe3fa..c0a47d8 100644
--- a/drivers/gpu/ion/Makefile
+++ b/drivers/gpu/ion/Makefile
@@ -1,2 +1,3 @@
 obj-$(CONFIG_ION) +=	ion.o ion_heap.o ion_system_heap.o ion_carveout_heap.o
 obj-$(CONFIG_ION_TEGRA) += tegra/
+obj-$(CONFIG_ION_MSM) += msm/