BSP configuration

The startup program is responsible for detecting the presence of VFP hardware:

Processor	Detection is performed by
ARMv6 processors	libstartup.a, armv_setup_v6()
Other processors	Board-specific startup routines

If the VFP is present, the startup program should ensure that:

coprocessor access to the VFP is enabled (if the processor supports selective access to individual coprocessors)
the VFP unit is disabled (the fpexc register's EN bit is set to 0)
the CPU_FLAG_FPU flag is set in the cpuinfo_entry->flags field for the CPU