Add AVX2 GFNI

[klauspost]

Seems like GFNI without AVX512 is only non-Xeon Intels.

 Intel(R) Core(TM) i5-L16G7 CPU @ 1.40GHz GFNI without cpuid.AVX512DQ                 
 Intel(R) Core(TM) i5-L16G7 CPU @ 1.40GHz GFNI without cpuid.AVX512DQ                 
 Intel Atom(R) x6425RE Processor @ 1.90GHz GFNI without cpuid.AVX512DQ                
 12th Gen Intel(R) Core(TM) i9-12900K GFNI without cpuid.AVX512DQ                     
 12th Gen Intel(R) Core(TM) i9-12900K GFNI without cpuid.AVX512DQ                     
 12th Gen Intel(R) Core(TM) i7-12800HX GFNI without cpuid.AVX512DQ                    
 12th Gen Intel(R) Core(TM) i5-12500T GFNI without cpuid.AVX512DQ                     
 12th Gen Intel(R) Core(TM) i5-12500 GFNI without cpuid.AVX512DQ                      
 12th Gen Intel(R) Core(TM) i3-12100 GFNI without cpuid.AVX512DQ                      
 Intel(R) Pentium(R) Gold G7400 GFNI without cpuid.AVX512DQ                           
 12th Gen Intel(R) Core(TM) i7-12700H GFNI without cpuid.AVX512DQ                     
 12th Gen Intel(R) Core(TM) i9-12900HK GFNI without cpuid.AVX512DQ                    
 12th Gen Intel(R) Core(TM) i9-12900H GFNI without cpuid.AVX512DQ                     
 12th Gen Intel(R) Core(TM) i3-1220P GFNI without cpuid.AVX512DQ                      
 Intel(R) Pentium(R) Gold 8505 GFNI without cpuid.AVX512DQ                            
 Intel(R) Pentium(R) Silver N6005 @ 2.00GHz GFNI without cpuid.AVX512DQ               
 Intel(R) Celeron(R) N5095A @ 2.00GHz GFNI without cpuid.AVX512DQ                     
 13th Gen Intel(R) Core(TM) i5-13600K GFNI without cpuid.AVX512DQ                     
 13th Gen Intel(R) Core(TM) i7-13700K GFNI without cpuid.AVX512DQ                     
 13th Gen Intel(R) Core(TM) i9-13900K GFNI without cpuid.AVX512DQ                     
 13th Gen Intel(R) Core(TM) i9-13900K GFNI without cpuid.AVX512DQ                     
 13th Gen Intel(R) Core(TM) i9-13900KF GFNI without cpuid.AVX512DQ                    
 Intel(R) Core(TM) i5-14600K GFNI without cpuid.AVX512DQ                              
 Intel(R) Core(TM) i7-14700K GFNI without cpuid.AVX512DQ                              
 Intel(R) Core(TM) i9-14900K GFNI without cpuid.AVX512DQ                              
 13th Gen Intel(R) Core(TM) i9-13900H GFNI without cpuid.AVX512DQ                     
 13th Gen Intel(R) CoreT i7-1370P GFNI without cpuid.AVX512DQ                         
 13th Gen Intel(R) CoreT i5-1350P GFNI without cpuid.AVX512DQ                         
 13th Gen Intel(R) Core(TM) i7-1365U GFNI without cpuid.AVX512DQ                      
 Intel(R) N95 GFNI without cpuid.AVX512DQ                                             
 Intel(R) Core(TM) i3-N305 GFNI without cpuid.AVX512DQ                                
 13th Gen Intel(R) Core(TM) i5-13500 GFNI without cpuid.AVX512DQ                      

Nevertheless it should be added. Probably only when pshufb is disabled.