[RISCV] Clean up stack-protector-target test

[mcgrathr]

Summary

Add some missed polish from https://reviews.llvm.org/D143355.

[jrtc27]

Thanks

llvm/test/CodeGen/RISCV/stack-protector-target.ll

 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 
 ;; Test target-specific stack cookie location.
 ;
 ; RUN: llc -mtriple=riscv64-fuchsia < %s | FileCheck --check-prefix=FUCHSIA-RISCV64 %s
 
-define void @func() sspreq {
+define void @func() sspreq nounwind {
 ; FUCHSIA-RISCV64-LABEL: func:
 ; FUCHSIA-RISCV64:       # %bb.0:
 ; FUCHSIA-RISCV64-NEXT:    addi sp, sp, -32
-; FUCHSIA-RISCV64-NEXT:    .cfi_def_cfa_offset 32
 ; FUCHSIA-RISCV64-NEXT:    sd ra, 24(sp) # 8-byte Folded Spill
-; FUCHSIA-RISCV64-NEXT:    .cfi_offset ra, -8
 ; FUCHSIA-RISCV64-NEXT:    ld a0, -16(tp)
 ; FUCHSIA-RISCV64-NEXT:    sd a0, 16(sp)
 ; FUCHSIA-RISCV64-NEXT:    addi a0, sp, 12
 ; FUCHSIA-RISCV64-NEXT:    call capture@plt
 ; FUCHSIA-RISCV64-NEXT:    ld a0, -16(tp)
 ; FUCHSIA-RISCV64-NEXT:    ld a1, 16(sp)
 ; FUCHSIA-RISCV64-NEXT:    bne a0, a1, .LBB0_2
 ; FUCHSIA-RISCV64-NEXT:  # %bb.1: # %SP_return
 ; FUCHSIA-RISCV64-NEXT:    ld ra, 24(sp) # 8-byte Folded Reload
 ; FUCHSIA-RISCV64-NEXT:    addi sp, sp, 32
 ; FUCHSIA-RISCV64-NEXT:    ret
 ; FUCHSIA-RISCV64-NEXT:  .LBB0_2: # %CallStackCheckFailBlk
 ; FUCHSIA-RISCV64-NEXT:    call __stack_chk_fail@plt
   %1 = alloca i32, align 4
-  call void @capture(ptr nonnull %1)
+  call void @capture(ptr %1)
   ret void
 }
 
 declare void @capture(ptr)