[U-Boot] [U-Boot,V2] MMC: DWMMC: Fix FIFO_DEPTH calculation

[Andy Fleming]

On Fri, May 24, 2013 at 06:15:34PM +0530, Rajeshwari Shinde wrote:
> Current DWMMC driver used to give FIFO underrun/overrun error every 3rd time
> for mmc rescan command.
> In current code FIFO_DEPTH is getting calculated after reading the default FIFOTH
> register and extracting the RX_WMARK bits from it i.e (RX_WMARK = FIFO_DEPTH/2 -1).
> Instead of storing the correct value, we were recalculating the FIFO_DEPT each
> time which is not correct.
> 
> Based on "[PATCH V9 3/9] DWMMC: Initialise dwmci and resolve EMMC read write issues"
> http://permalink.gmane.org/gmane.comp.boot-loaders.u-boot/160247
> 
> Signed-off-by: Hatim Ali <hatim.rv at samsung.com>
> Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
> Acked-by: Simon Glass <sjg at chromium.org>
> Tested-by: Simon Glass <sjg at chromium.org>
> Acked-by: Jaehoon Chung <jh80.chung at samsung.com>

Acked-by: Andy Fleming <afleming at freescale.com>

Looks like the patch this is based on is already accepted, but not yet
upstream, so I'm going to delegate the patch to Minkyu Kang