da830: fixup ARM relocation support

Fixes build breakage in da830evm after commit
97003756 "da8xx: fixup ARM
relocation support"

The da8xx fixup commit changed da830/da850 common code to make
relocation work in da850, but didn't add the required defines
to da830evm_config.h resulting in build failure in the common code.

This patch adds those defines for da830, but makes no sense without
also referring to the commit mentioned above.

Signed-off-by: Nick Thompson <nick.thompson@ge.com>
Reviewed-by: Ben Gardiner <bengardiner@nanometrics.ca>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>