mmc: tmio: fixup compile error

This patch fixes the below compile error:

${LINUX}/drivers/mmc/host/tmio_mmc.c: In function 'tmio_mmc_probe':
${LINUX}/drivers/mmc/host/tmio_mmc.c:93:35: \
	error: 'res_ctl' undeclared (first use in this function)
${LINUX}/drivers/mmc/host/tmio_mmc.c:93:35: \
	note: each undeclared identifier is reported only \
	once for each function it appears in
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Chris Ball <chris@printf.net>

drivers/mmc/host/tmio_mmc.c

@@ -90,7 +90,7 @@ static int tmio_mmc_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
-	pdata->bus_shift = resource_size(res_ctl) >> 10;
+	pdata->bus_shift = resource_size(res) >> 10;
 	pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;
 
 	ret = tmio_mmc_host_probe(&host, pdev, pdata);