Clarify the northbridge ops function names. Change-Id: If7d89de761c1e22f9ae39d36f5cf334cc2910e1d Signed-off-by: Marc Jones <marc.jones@se-eng.com> Reviewed-on: http://review.coreboot.org/2166 Tested-by: build bot (Jenkins) Reviewed-by: Dave Frodin <dave.frodin@se-eng.com> Reviewed-by: Martin Roth <martin.roth@se-eng.com>