[U-Boot] [PATCH] mmc: Fix uninitialised priv member

[Alex Kiernan]

When using omap_hsmmc without the device model then the allocation
of mmc->priv ends up uninitialised.

Signed-off-by: Alex Kiernan <alex.kiernan at gmail.com>
---
I've a board (AM335xx based) which boots fine with 2018-01, with
2018-03-rc1 (actually 1811a92) it fails in the MLO:

  U-Boot SPL 2018.03-rc1-00222-g128a503-dirty (Feb 09 2018 - 11:51:50 +0000)
  Trying to boot from MMC2
  omap_hsmmc_send_cmd : DMA timeout: No status update
  mmc_init: -110, time 1026
  spl: mmc init failed with error: -110
  SPL: failed to boot from all boot devices
  ### ERROR ### Please RESET the board ###

Bisecting it out, it's this commit:

  f0d53e8 mmc: omap_hsmmc: Add support for DMA (ADMA2)

 drivers/mmc/omap_hsmmc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
index b12d6d9..c6b3f25 100644
--- a/drivers/mmc/omap_hsmmc.c
+++ b/drivers/mmc/omap_hsmmc.c
@@ -918,7 +918,7 @@ int omap_mmc_init(int dev_index, uint host_caps_mask, uint f_max, int cd_gpio,
 	struct mmc_config *cfg;
 	uint host_caps_val;
 
-	priv = malloc(sizeof(*priv));
+	priv = calloc(1, sizeof(*priv));
 	if (priv == NULL)
 		return -1;
 
-- 
2.7.4