Backported SPC560Dxx port from trunk.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/stable_2.6.x@5878 35acf78f-673a-0410-8e92-d51de3d6d3f4
Made queues and semaphores benchmarks conditional.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/stable_2.6.x@5883 35acf78f-673a-0410-8e92-d51de3d6d3f4
Safer implementation of thread wakeup.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/stable_2.6.x@5910 35acf78f-673a-0410-8e92-d51de3d6d3f4
chibios: stm32: disable otg vbus sensing
stm32f4: fix flash setup
GCC/ARMCMx: remove naked attribute from ResetHandler
GCC/ARMCMx: fix v7m assembler routines
GCC/ARMCMx: remove naked attribute from _default_exit
GCC/ARMCMx/crt0: include ch.h