RS780: print the vgainfo

RS780: print the vgainfo

With this commit the vgainfo is printed and looks like that on the serial console:
vgainfo:
  ulBootUpEngineClock:50000
  ulBootUpUMAClock:66700
  ulBootUpSidePortClock:0
  ulMinSidePortClock:0
  ulSystemConfig:0
  ulBootUpReqDisplayVector:0
  ulOtherDisplayMisc:0
  ulDDISlot1Config:0
  ulDDISlot2Config:0
  ucMemoryType:0
  ucUMAChannelNumber:1
  ucDockingPinBit:0
  ucDockingPinPolarity:0
  ulDockingPinCFGInfo:0
  ulCPUCapInfo: 2
  usNumberOfCyclesInPeriod:0
  usMaxNBVoltage:0
  usMinNBVoltage:0
  usBootUpNBVoltage:0
  ulHTLinkFreq:20000
  usMinHTLinkWidth:8
  usMaxHTLinkWidth:8
  usUMASyncStartDelay:100
  usUMADataReturnTime:300
  usLinkStatusZeroTime:600
  ulHighVoltageHTLinkFreq:20000
  ulLowVoltageHTLinkFreq:20000
  usMaxUpStreamHTLinkWidth:8
  usMaxDownStreamHTLinkWidth:8
  usMinUpStreamHTLinkWidth:8
  usMinDownStreamHTLinkWidth:8

Change-Id: I17c2a13ab52a0f78588f812d4f42f45f9a7b7524
Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
Reviewed-on: http://review.coreboot.org/456
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>