mmc: sdhci-bcm-kona: fix build errors when built-in

commit 4025ce24 upstream.

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

Fixes: 058feb53 ("mmc: sdhci-bcm-kona: make linker-section warning go away")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-by: Markus Mayer <markus.mayer@linaro.org>
Acked-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Chris Ball <chris@printf.net>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

drivers/mmc/host/sdhci-bcm-kona.c

@@ -314,7 +314,7 @@ static int sdhci_bcm_kona_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int __exit sdhci_bcm_kona_remove(struct platform_device *pdev)
+static int sdhci_bcm_kona_remove(struct platform_device *pdev)
 {
 	return sdhci_pltfm_unregister(pdev);
 }