msm: iommu: Kconfig dependency for the IOMMU API

Make the IOMMU driver select the IOMMU API in the kernel
configuration.

Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index 1c6f76b..1a11f1e 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -44,6 +44,7 @@
 	select CPU_V7
 	select MSM_V2_TLMM
 	select MSM_GPIOMUX
+	select IOMMU_API
 
 endchoice
 
@@ -166,4 +167,7 @@
 
 config MSM_V2_TLMM
 	bool
+
+config IOMMU_API
+	bool
 endif