arm: socfpga: update MAINTAINERS' file for cyclone5_socdk and arria5_socdk

commit "arm: socfpga: rename socfpga_cyclone5 and socfpga_arria5 config files"
renames the configs files, so we should update the MAINTAINERS' entry. At
the same time, update the email for Dinh Nguyen.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
2 files changed