mmc: dw_mmc: Calculate timeout from transfer length

mmc: dw_mmc: Calculate timeout from transfer length

The current 4-minute data transfer timeout is misleading and broken.
Instead of such a long wait, calculate the timeout duration based on
the length of the data transfer. The current formula is the transfer
length in bits, divided by a multiplication of bus frequency in Hz,
bus width, DDR mode and converted the mSec. The value is bounded from
the bottom to 1000 mSec.

Signed-off-by: Marek Vasut <[email protected]>
Cc: Jaehoon Chung <[email protected]>
Cc: Simon Glass <[email protected]>