mmc: davinci: Don't strip remove function when driver is builtin

Using __exit for the remove function results in the remove callback being
discarded with CONFIG_MMC_DAVINCI=y. When such a device gets unbound (e.g.
using sysfs or hotplug), the driver is just removed without the cleanup
being performed. This results in resource leaks. Fix it by compiling in the
remove callback unconditionally.

This also fixes a W=1 modpost warning:

WARNING: modpost: drivers/mmc/host/davinci_mmc: section mismatch in
reference: davinci_mmcsd_driver+0x10 (section: .data) ->
davinci_mmcsd_remove (section: .exit.text)

Fixes: b4cff45 ("DaVinci: MMC: MMC/SD controller driver for DaVinci family")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240324114017.231936-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: Uwe Kleine-König

drivers/mmc/host/davinci_mmc.c

@@ -1337,7 +1337,7 @@ static int davinci_mmcsd_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static void __exit davinci_mmcsd_remove(struct platform_device *pdev)
+static void davinci_mmcsd_remove(struct platform_device *pdev)
 {
 	struct mmc_davinci_host *host = platform_get_drvdata(pdev);
 
@@ -1392,7 +1392,7 @@ static struct platform_driver davinci_mmcsd_driver = {
 		.of_match_table = davinci_mmc_dt_ids,
 	},
 	.probe		= davinci_mmcsd_probe,
-	.remove_new	= __exit_p(davinci_mmcsd_remove),
+	.remove_new	= davinci_mmcsd_remove,
 	.id_table	= davinci_mmc_devtype,
 };