Revert "ARM Makefile: static define of SaberMod toolchain for graphite"

This reverts commit 3fbd5eeb0b8ff2a577ba36cf132ed139d803855c.
Revert "ARM Makefile: Enabled graphite switches"

This reverts commit 42884247c4e310b1f417d5ad6e61c53703e7db53.