Fix compiling failure with 'O=' parameter#8

xingrz wants to merge 1 commit intofriendlyarm:nanopi2-lollipop-mr1friendlyarm/linux-3.4.y:nanopi2-lollipop-mr1from

nanopi3-dev:lollipop-mr1-patch-hdmi-cec-compiling-failurenanopi3-dev/android_kernel_friendly-arm_s5p6818:lollipop-mr1-patch-hdmi-cec-compiling-failureCopy head branch name to clipboard