[RISCV][VLOPT] Fix some typos in vl-opt-op-info.mir test. NFC

vleN_v_incompatible_emul reassigns to %x and
vsuxeiN_v_idx_incompatible_eew has a dead instruction

Author: lukel97

llvm/test/CodeGen/RISCV/rvv/vl-opt-op-info.mir

@@ -648,9 +648,9 @@ body: |
   bb.0:
     ; CHECK-LABEL: name: vleN_v_incompatible_emul
     ; CHECK: %x:vr = PseudoVLE8_V_M1 $noreg, $noreg, -1, 3 /* e8 */, 0 /* tu, mu */
-    ; CHECK-NEXT: %x:vr = PseudoVADD_VV_MF2 $noreg, %x, $noreg, 1, 3 /* e8 */, 0 /* tu, mu */
+    ; CHECK-NEXT: %y:vr = PseudoVADD_VV_MF2 $noreg, %x, $noreg, 1, 3 /* e8 */, 0 /* tu, mu */
     %x:vr = PseudoVLE8_V_M1 $noreg, $noreg, -1, 3 /* e8 */, 0
-    %x:vr = PseudoVADD_VV_MF2 $noreg, %x, $noreg, 1, 3 /* e8 */, 0
+    %y:vr = PseudoVADD_VV_MF2 $noreg, %x, $noreg, 1, 3 /* e8 */, 0
 ...
 ---
 name: vlm_v
@@ -758,10 +758,8 @@ body: |
   bb.0:
     ; CHECK-LABEL: name: vsuxeiN_v_idx_incompatible_eew
     ; CHECK: %x:vr = PseudoVADD_VV_M1 $noreg, $noreg, $noreg, -1, 4 /* e16 */, 0 /* tu, mu */
-    ; CHECK-NEXT: %y:vr = PseudoVADD_VV_M1 $noreg, $noreg, $noreg, -1, 3 /* e8 */, 0 /* tu, mu */
     ; CHECK-NEXT: PseudoVSUXEI8_V_M1_M1 $noreg, $noreg, %x, 1, 3 /* e8 */
     %x:vr = PseudoVADD_VV_M1 $noreg, $noreg, $noreg, -1, 4 /* e16 */, 0
-    %y:vr = PseudoVADD_VV_M1 $noreg, $noreg, $noreg, -1, 3 /* e8 */, 0
     PseudoVSUXEI8_V_M1_M1 $noreg, $noreg, %x, 1, 3 /* e8 */
 ...
 ---