[AArch64] Test update for a510 generic sched. NFC

[mstorsjo]

LGTM, I was just about to push the same change. It seems that you in commit db158c7c830807caeeb0691739c41f1d522029e9 updated this test reference but with an older version of llc that didn't include the changes from the preceding commit 955d7615bd7563cc78a5106215daf9e6e47ffb5e. It would probably be good to explain that in the commit message.

llvm/test/CodeGen/AArch64/win64_vararg2.ll

 ; CHECK-NEXT:    .seh_endepilogue
 ; CHECK-NEXT:    ret
 ; CHECK-NEXT:    .seh_endfunclet
 ; CHECK-NEXT:    .seh_endproc
 ;
 ; GISEL-LABEL: va_func:
 ; GISEL:       .seh_proc va_func
 ; GISEL-NEXT:  // %bb.0:
-; GISEL-NEXT:    str x19, [sp, #-64]! // 8-byte Folded Spill
-; GISEL-NEXT:    .seh_save_reg_x x19, 64
-; GISEL-NEXT:    str x30, [sp, #8] // 8-byte Folded Spill
-; GISEL-NEXT:    .seh_save_reg x30, 8
+; GISEL-NEXT:    sub sp, sp, #80
+; GISEL-NEXT:    .seh_stackalloc 80
+; GISEL-NEXT:    str x19, [sp, #16] // 8-byte Folded Spill
+; GISEL-NEXT:    .seh_save_reg x19, 16
+; GISEL-NEXT:    str x30, [sp, #24] // 8-byte Folded Spill
+; GISEL-NEXT:    .seh_save_reg x30, 24
 ; GISEL-NEXT:    .seh_endprologue
-; GISEL-NEXT:    stp x3, x4, [sp, #24]
+; GISEL-NEXT:    stp x3, x4, [sp, #40]
 ; GISEL-NEXT:    mov w19, w0
-; GISEL-NEXT:    stp x5, x6, [sp, #40]
-; GISEL-NEXT:    str x7, [sp, #56]
-; GISEL-NEXT:    str w0, [sp, #4]
-; GISEL-NEXT:    strb w1, [sp, #3]
-; GISEL-NEXT:    strb w2, [sp, #2]
+; GISEL-NEXT:    stp x5, x6, [sp, #56]
+; GISEL-NEXT:    str x7, [sp, #72]
+; GISEL-NEXT:    str w0, [sp, #12]
+; GISEL-NEXT:    strb w1, [sp, #11]
+; GISEL-NEXT:    strb w2, [sp, #10]
 ; GISEL-NEXT:    bl other
 ; GISEL-NEXT:    cmp w19, w0
 ; GISEL-NEXT:    cset w0, ls
 ; GISEL-NEXT:    .seh_startepilogue
-; GISEL-NEXT:    ldr x30, [sp, #8] // 8-byte Folded Reload
-; GISEL-NEXT:    .seh_save_reg x30, 8
-; GISEL-NEXT:    ldr x19, [sp], #64 // 8-byte Folded Reload
-; GISEL-NEXT:    .seh_save_reg_x x19, 64
+; GISEL-NEXT:    ldr x30, [sp, #24] // 8-byte Folded Reload
+; GISEL-NEXT:    .seh_save_reg x30, 24
+; GISEL-NEXT:    ldr x19, [sp, #16] // 8-byte Folded Reload
+; GISEL-NEXT:    .seh_save_reg x19, 16
+; GISEL-NEXT:    add sp, sp, #80
+; GISEL-NEXT:    .seh_stackalloc 80
 ; GISEL-NEXT:    .seh_endepilogue
 ; GISEL-NEXT:    ret
 ; GISEL-NEXT:    .seh_endfunclet
 ; GISEL-NEXT:    .seh_endproc
   %a_alloc = alloca i32, align 4
   %b_alloc = alloca i8, align 1
   %c_alloc = alloca i8, align 1
   store i32 %a, ptr %a_alloc, align 4