Add link for TI TS5A23159 specification. TEST=None Change-Id: I2756ded963fc7597e4db1fa151bf62630b1108d9 Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com> Reviewed-on: https://review.coreboot.org/15003 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>