rk1808: bl31: update version to v1.16

Build from ATF commit:
40d83c38a
update feature:
40d83c38a
116060688 commit_elf.sh: add message to rkbin doc

Change-Id: Id178a5ffd27981fbab964ab941

rk1808: bl31: update version to v1.16

Build from ATF commit:
40d83c38a
update feature:
40d83c38a
116060688 commit_elf.sh: add message to rkbin doc

Change-Id: Id178a5ffd27981fbab964ab941d083f08ec7b5fd
Signed-off-by: XiaoDong Huang <derrick.huang@rock-chips.com>

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