[AMDGPU][True16][test] added missing true16 flag in gfx12 asm vop1 (llvm#104884)

added missing true16 flag in gfx12 asm vop1

Author: broxigarchen

llvm/test/MC/AMDGPU/gfx12_asm_vop1-fake16.s

@@ -1,7 +1,7 @@
 // RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,-real-true16 -show-encoding %s | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-ASM %s
-// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,-real-true16 -show-encoding %s | %extract-encodings | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32 -disassemble -show-encoding | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
+// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,-real-true16 -show-encoding %s | %extract-encodings | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,-real-true16 -disassemble -show-encoding | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
 // RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,-real-true16 -show-encoding %s | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-ASM %s
-// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,-real-true16 -show-encoding %s | %extract-encodings | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64 -disassemble -show-encoding | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
+// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,-real-true16 -show-encoding %s | %extract-encodings | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,-real-true16 -disassemble -show-encoding | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
 
 v_bfrev_b32_e32 v5, v1
 // GFX12: v_bfrev_b32_e32 v5, v1                  ; encoding: [0x01,0x71,0x0a,0x7e]