uartlite: Fix build on sparc.

We can get this driver enabled via MFD_TIMBERDALE which only
requires GPIO to be on.

But the of_address_to_resource() function is only present on
powerpc and microblaze, so we have to conditionalize the
CONFIG_OF probing bits on that.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

drivers/serial/uartlite.c

@@ -19,7 +19,7 @@
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <asm/io.h>
-#if defined(CONFIG_OF)
+#if defined(CONFIG_OF) && (defined(CONFIG_PPC32) || defined(CONFIG_MICROBLAZE))
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/of_platform.h>
@@ -581,7 +581,7 @@ static struct platform_driver ulite_platform_driver = {
 /* ---------------------------------------------------------------------
  * OF bus bindings
  */
-#if defined(CONFIG_OF)
+#if defined(CONFIG_OF) && (defined(CONFIG_PPC32) || defined(CONFIG_MICROBLAZE))
 static int __devinit
 ulite_of_probe(struct of_device *op, const struct of_device_id *match)
 {
@@ -631,11 +631,11 @@ static inline void __exit ulite_of_unregister(void)
 {
 	of_unregister_platform_driver(&ulite_of_driver);
 }
-#else /* CONFIG_OF */
-/* CONFIG_OF not enabled; do nothing helpers */
+#else /* CONFIG_OF && (CONFIG_PPC32 || CONFIG_MICROBLAZE) */
+/* Appropriate config not enabled; do nothing helpers */
 static inline int __init ulite_of_register(void) { return 0; }
 static inline void __exit ulite_of_unregister(void) { }
-#endif /* CONFIG_OF */
+#endif /* CONFIG_OF && (CONFIG_PPC32 || CONFIG_MICROBLAZE) */
 
 /* ---------------------------------------------------------------------
  * Module setup/teardown