Move include of reg_access.h from pci_devs.h to reg_access.c.
TEST=Build and run on Galileo Gen2
Change-Id: I0d2de96f51c56001cdd06c7974cbc649fde1e89c
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/19355
Tested-by: build bot (Jenkins)
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>