of_serial: fix section mismatch warnings

Fix the following section mismatches:

WARNING: drivers/built-in.o(.exit.text+0x5a): Section mismatch in reference from the function of_platform_serial_exit() to the variable .devinit.data:of_platform_serial_driver
The function __exit of_platform_serial_exit() references
a variable __devinitdata of_platform_serial_driver.
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/serial/of_serial.c

@@ -138,7 +138,7 @@ static struct of_device_id __devinitdata of_platform_serial_table[] = {
 	{ /* end of list */ },
 };
 
-static struct of_platform_driver __devinitdata of_platform_serial_driver = {
+static struct of_platform_driver of_platform_serial_driver = {
 	.owner = THIS_MODULE,
 	.name = "of_serial",
 	.probe = of_platform_serial_probe,