[DRA7] support ES1.1 samples as well

Support for ES1.1 IDCODE for DRA7. just revision value change.

Tested-by: Vishal Mahaveer <vishalm@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Merge pull request #31 from nmenon/es1.1

[DRA7] support ES1.1 samples as well