arm: mvebu: fix A38x breakage from commit bb872dd9

This function parameter usage of load_addr was incorrectly caught in
the clarifying renames of commit bb872dd9, which results in boot
failures on Marvell A38x.

Signed-off-by: Joel Johnson <mrjoel@lixil.net>
Patch-to: Simon Glass <sjg@chromium.org>