fsi/sbefifo: Add dependency on OF_ADDRESS

The driver calls of_platform_device_create() which is only available
if OF_ADDRESS is enabled. When building sparc64 images, this results
in

ERROR: "of_platform_device_create" [drivers/fsi/fsi-sbefifo.ko] undefined!

Fixes: 9f4a8a2d ("fsi/sbefifo: Add driver for the SBE FIFO")
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

drivers/fsi/Kconfig

@@ -34,6 +34,7 @@ config FSI_SCOM
 
 config FSI_SBEFIFO
 	tristate "SBEFIFO FSI client device driver"
+	depends on OF_ADDRESS
 	---help---
 	This option enables an FSI based SBEFIFO device driver. The SBEFIFO is
 	a pipe-like FSI device for communicating with the self boot engine