ANDROID: rockchip: enable 'setexpr' command

This enables the 'setexpr' command, which allows for arithmetic
operations to be performed in U-Boot.

Bug: 142283345
Test: manual run and inspection on RockPi 4b
Change-Id: Ia4a947b8e0048210ea5f52d01d9b49b9e6a88cef
Signed-off-by: Tristan Muntsinger <muntsinger@google.com>
1 file changed