sunxi-cedarx: fix armel and internal toolchain build issues

Fixes autobuilder issues
http://autobuild.buildroot.org/results/a06/a06fe1f2fa2cb57d57524eff5f7b88fe36fdbf68
http://autobuild.buildroot.org/results/328/328b36c3cbf952cccabf16a25fc13f0c3515e8bd



Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Spenser Gilliland <spenser@gillilanding.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>