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 <[email protected]>
Signed-off-by: Kuninori Morimoto <[email protected]>
Acked-by: Simon Horman <[email protected]>
Signed-off-by: Chris Ball <[email protected]>
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index 8a781e2..1900abb 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -90,7 +90,7 @@
 		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);