Revert "lib/int_sqrt.c: optimize square root algorithm"

This reverts commit d290c65316d2c31716b55cc6efb6f60bc6eb66be.
Revert "Makefile: Optimizing build-options for linaro"

This reverts commit 21c534b819b7571f89f65ddfebc291d076439889.
Revert "Makefile: Added Snapdragon optimizations"

This reverts commit f391aa8ae8f9757c23e3cbd976767782191c3efa.