ARM: OMAP2+: hwmod: extract module address space from DT blob

Patch adds the code for extracting the module ocp address space
from device tree blob in case the hwmod address space look up fails.

The idea is to remove the address space data from hwmod and extract
it from DT blob.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Benoit Cousson <benoit.cousson@linaro.org>