mmc: sdhci: fix retuning timer wrongly deleted in sdhci_tasklet_finish

Currently, the retuning timer for retuning mode 1 will be deleted in
function sdhci_tasklet_finish after a mmc request done, which will make
retuning timing never trigger again. This patch fixed this problem.

Signed-off-by: Aaron Lu <Aaron.Lu@amd.com>
Reviewed-by: Philip Rakity <prakity@marvell.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

drivers/mmc/host/sdhci.c

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index c31a334..262985a 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1867,9 +1867,6 @@
 
 	del_timer(&host->timer);
 
-	if (host->version >= SDHCI_SPEC_300)
-		del_timer(&host->tuning_timer);
-
 	mrq = host->mrq;
 
 	/*