mmc: renesas_sdhi_core: Add missing tmio_mmc_host_free() at remove

The commit 94b110a ("mmc: tmio: add tmio_mmc_host_alloc/free()")
added tmio_mmc_host_free(), but missed the function calling in
the sh_mobile_sdhi_remove() at that time. So, fix it. Otherwise,
we cannot rebind the sdhi/mmc devices when we use aliases of mmc.

Fixes: 94b110a ("mmc: tmio: add tmio_mmc_host_alloc/free()")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1604654730-29914-1-git-send-email-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/renesas_sdhi_core.c

@@ -1160,6 +1160,7 @@ int renesas_sdhi_remove(struct platform_device *pdev)
 
 	tmio_mmc_host_remove(host);
 	renesas_sdhi_clk_disable(host);
+	tmio_mmc_host_free(host);
 
 	return 0;
 }