Hi Sagar,
You can get rid of above said error using patch:
https://lkml.org/lkml/2013/1/21/754
But this warning really not solves your problem.Please confirm.
Here, the problem is u-boot not able to read kernel header format/ uImage header format
is not updated and hence giving error: Wrong Image Format for bootm command.
Probable cause is u-boot not able to read uImage from memory.
Can you just try to load uImage at an address 0xc0700000?
Regards
Manish Badarkhe
