configs: rk3308-aarch32-amp: Enable boot android support

Change-Id: If2805e3ed9cb24ddb2ebe8bb6cc28824c309db84
Signed-off-by: Hongming Zou <hongming.zou@rock-chips.com>

configs: Add rk3308-aarch32-amp_defconfig

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Change-Id: Ibc067b3d80da2bdbeae53cef913da11e805060cd