Merge branch 'master', remote branch 'remotes/BernardXiong/master'
Signed-off-by: visitor83 <wolflouiswang@gmail.com>
format the s3c24x0 serial.c and mini2440 rtconfig.py
Merge pull request #107 from visitor83/pulls

format s3c24x0 serial.c and mini2440 rtconfig.py
update libcpu/arm/cortex-m4: restore MSP.
update libcpu/arm/cortex-m3: restore MSP.
update libcpu/arm/cortex-m0: restore MSP.