Configuring EDMA xbar not working in 3.12

[corrosion]

In file arch/arm/common/edma.c function edma_of_read_u32_to_s16_array() doesn't parse the "ti,edma-xbar-event-map" configuration from DT file correctly.

As a result xbar_chans[0][0] is -1 in edma_xbar_event_map() and nothing is being written to the EDMA xbar registers.

Same funcion (edma_of_read_u32_to_s16_array()) works properly in kernel 3.8.

[ashcharles]

http://permalink.gmane.org/gmane.linux.kernel.commits.head/446393 fixes this issue for me. Tested with Gumstix Pepper with patch cherry-picked to a 3.14.4-based kernel.