OMAP4: ABE: Add ABE platform device

Add platform device for Audio Backend.

Change-Id: I6e60329533f24198ee840998f60f71a7924a7878
Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Misael Lopez Cruz <misael.lopez@ti.com>
diff --git a/arch/arm/mach-omap2/devices.c b/arch/arm/mach-omap2/devices.c
index 5b8ca68..cbc471c 100644
--- a/arch/arm/mach-omap2/devices.c
+++ b/arch/arm/mach-omap2/devices.c
@@ -292,6 +292,21 @@
 
 static inline void omap_init_sti(void) {}
 
+#if defined CONFIG_ARCH_OMAP4
+
+static struct platform_device omap_abe_dai = {
+	.name	= "omap-abe-dai",
+	.id	= -1,
+};
+
+static inline void omap_init_abe(void)
+{
+	platform_device_register(&omap_abe_dai);
+}
+#else
+static inline void omap_init_abe(void) {}
+#endif
+
 #if defined(CONFIG_SND_SOC) || defined(CONFIG_SND_SOC_MODULE)
 
 static struct platform_device omap_pcm = {
@@ -681,6 +696,7 @@
 	 * please keep these calls, and their implementations above,
 	 * in alphabetical order so they're easier to sort through.
 	 */
+	omap_init_abe();
 	omap_init_audio();
 	omap_init_camera();
 	omap_init_mbox();