rtc: ds3234 doesn't link when built-in

When ds3234 is built-in, the final links fails with the following vague error
message:

`.exit.text' referenced in section `.data' of drivers/built-in.o: defined in discarded section `.exit.text' of drivers/built-in.o

ds3234_remove() cannot be marked __exit, as it's accessed via __devexit_p().
In addition, mark ds3234_probe() __devinit while we're at it.
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Acked-by: NAlessandro Zummo <a.zummo@towertech.it>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-ds3234.c

@@ -189,7 +189,7 @@ static const struct rtc_class_ops ds3234_rtc_ops = {
 	.set_time	= ds3234_set_time,
 };
 
-static int ds3234_probe(struct spi_device *spi)
+static int __devinit ds3234_probe(struct spi_device *spi)
 {
 	struct rtc_device *rtc;
 	unsigned char tmp;
@@ -249,7 +249,7 @@ static int ds3234_probe(struct spi_device *spi)
 	return 0;
 }
 
-static int __exit ds3234_remove(struct spi_device *spi)
+static int __devexit ds3234_remove(struct spi_device *spi)
 {
 	struct ds3234 *chip = platform_get_drvdata(spi);
 	struct rtc_device *rtc = chip->rtc;