[AArch64] Fix branch, terminator, etc properties for BRA* instructions.

[kristof.beyls]

Summary

Tests relying on some of these fixes will be added for this in follow-on
patches that introduce new features that require these properties to be
correct.

[ostannard]

LGTM

llvm/lib/Target/AArch64/AArch64InstrInfo.td

let Predicates = [HasPA] in {
   defm PAC : SignAuth<0b000, 0b010, "pac">;
   defm AUT : SignAuth<0b001, 0b011, "aut">;
 
   def XPACI : SignAuthZero<0b100, 0b00, "xpaci">;
   def XPACD : SignAuthZero<0b100, 0b01, "xpacd">;
   def PACGA : SignAuthTwoOperand<0b1100, "pacga", null_frag>;
 
   // Combined Instructions
+  let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1  in {
     def BRAA    : AuthBranchTwoOperands<0, 0, "braa">;
     def BRAB    : AuthBranchTwoOperands<0, 1, "brab">;
+  }
+  let isCall = 1, Defs = [LR], Uses = [SP] in {
     def BLRAA   : AuthBranchTwoOperands<1, 0, "blraa">;
     def BLRAB   : AuthBranchTwoOperands<1, 1, "blrab">;
+  }
 
+  let isBranch = 1, isTerminator = 1, isBarrier = 1, isIndirectBranch = 1  in {
     def BRAAZ   : AuthOneOperand<0b000, 0, "braaz">;
     def BRABZ   : AuthOneOperand<0b000, 1, "brabz">;
+  }
+  let isCall = 1, Defs = [LR], Uses = [SP] in {
     def BLRAAZ  : AuthOneOperand<0b001, 0, "blraaz">;
     def BLRABZ  : AuthOneOperand<0b001, 1, "blrabz">;
+  }
 
   let isReturn = 1, isTerminator = 1, isBarrier = 1 in {
     def RETAA   : AuthReturn<0b010, 0, "retaa">;
     def RETAB   : AuthReturn<0b010, 1, "retab">;
     def ERETAA  : AuthReturn<0b100, 0, "eretaa">;
     def ERETAB  : AuthReturn<0b100, 1, "eretab">;
   }