da850: add support for Spectrum Digital AM18xx EVM
The AM18xx EVM contains winbond SPI flash instead of ST SPI flash in
comparison with logic PD da850/omap-l138 EVM. So enable configuration
to look for winbond flash.
Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Signed-off-by: Nagabhushana Netagunte <nagabhushana.netagunte@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Manjunathappa, Prakash