MBP early 2011 EFI update
According to Apple you should use following EFI versions.

MacBook Pro (13-inch, Early 2011)   MacBookPro8,1   MBP81.0047.B27 (EFI 2.7)    1.68f99 (SMC 1.6)
MacBook Pro (15-inch, Early 2011)   MacBookPro8,2   MBP81.0047.B27 (EFI 2.7)    1.69f4 (SMC 1.7)