sdhci has a 10 second timeout to catch devices that stop responding.
Instead of programming 10 second arbitrary value, calculate the total time
it would take for the entire transfer to happen and program the timeout
value accordingly.

Signed-off-by: Kishon Vijay Abraham I <redacted>
---
 drivers/mmc/host/sdhci.c | 46 +++++++++++++++++++++++++++++++++++++++-------
 drivers/mmc/host/sdhci.h | 10 ++++++++++
 2 files changed, 49 insertions(+), 7 deletions(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 0489572d1892..d52f9e7eabe2 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c

@@ -673,6 +673,37 @@ static void sdhci_adma_table_post(struct sdhci_host *host,
 	}
 }
 
+static void sdhci_calc_sw_timeout(struct sdhci_host *host,
+				  struct mmc_command *cmd,
+				  unsigned int target_timeout)
+{
+	struct mmc_data *data = cmd->data;
+	struct mmc_host *mmc = host->mmc;
+	unsigned long long transfer_time;
+	struct mmc_ios *ios = &mmc->ios;
+	unsigned char bus_width = ios->bus_width;