semc-smultron: switch to armv7 and fix boot issues (MR 768)

device/testing/device-semc-smultron/APKBUILD

device/testing/device-semc-smultron/deviceinfo

...ing/linux-semc-smultron/02_gpu-msm-fix-gcc5-compile.patch

device/testing/linux-semc-smultron/APKBUILD

...ce/testing/linux-semc-smultron/config-semc-smultron.armv7

...testing/linux-semc-smultron/fix-perf_trace_counters.patch

.../testing/linux-semc-smultron/fix-proc-file-handling.patch

...-smultron/gcc7-give-up-on-ilog2-const-optimizations.patch

device/testing/linux-semc-smultron/gcc8-fix-put-user.patch

...c-smultron/kernel-use-the-gnu89-standard-explicitly.patch