[mips] Remove two more redundant 'let Predicates = [HasStdEnc]' statements that were missed

[dsanders]

Summary

The InstSE class already initializes Predicates to [HasStdEnc].

No functional change (confirmed by diffing tablegen-erated files before and
after)

lib/Target/Mips/MipsCondMov.td

multiclass MovnPats<RegisterClass CRC, RegisterClass DRC, Instruction MOVNInst,
   def : MipsPat<(select (i32 (setne CRC:$lhs, 0)),DRC:$T, DRC:$F),
                 (MOVNInst DRC:$T, CRC:$lhs, DRC:$F)>;
 }
 
 // Instantiation of instructions.
 def MOVZ_I_I : MMRel, CMov_I_I_FT<"movz", GPR32Opnd, GPR32Opnd, II_MOVZ>,
                ADD_FM<0, 0xa>;
 
-let Predicates = [HasStdEnc], isCodeGenOnly = 1 in {
+let isCodeGenOnly = 1 in {
   def MOVZ_I_I64   : CMov_I_I_FT<"movz", GPR32Opnd, GPR64Opnd, II_MOVZ>,
                      ADD_FM<0, 0xa>;
   def MOVZ_I64_I   : CMov_I_I_FT<"movz", GPR64Opnd, GPR32Opnd, II_MOVZ>,
                      ADD_FM<0, 0xa>;
   def MOVZ_I64_I64 : CMov_I_I_FT<"movz", GPR64Opnd, GPR64Opnd, II_MOVZ>,
                      ADD_FM<0, 0xa>;
 }
 
 def MOVN_I_I       : MMRel, CMov_I_I_FT<"movn", GPR32Opnd, GPR32Opnd, II_MOVN>,
                      ADD_FM<0, 0xb>;
 
-let Predicates = [HasStdEnc], isCodeGenOnly = 1 in {
+let isCodeGenOnly = 1 in {
   def MOVN_I_I64   : CMov_I_I_FT<"movn", GPR32Opnd, GPR64Opnd, II_MOVN>,
                      ADD_FM<0, 0xb>;
   def MOVN_I64_I   : CMov_I_I_FT<"movn", GPR64Opnd, GPR32Opnd, II_MOVN>,
                      ADD_FM<0, 0xb>;
   def MOVN_I64_I64 : CMov_I_I_FT<"movn", GPR64Opnd, GPR64Opnd, II_MOVN>,
                      ADD_FM<0, 0xb>;
 }