Enable other devices in makefile
Enable other devices in makefile

FIX the ARMV7M_GCCFLAGS only works for Cortex-M4 devices,
the ARMV7M_GCCFLAGS is goes back to the same as the adamgreen's
version(SHA:6173b8c59f2e69f642971534395a834a563fdae9).

Enabling other devices in makefile which is disabled in
the commit(SHA:4a514bc0184c5e132cc31a8c0a254d25281fad28).

The configure is tested well on STM32F429i-Discovery with the
host using Ubuntu15.04 64-bits version.

adamgreen/mri,adamgreen/mri,adamgreen/mri