[llvm] [PowerPC] Add error for incorrect use of memory operands (PR #114277)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-x86_64-debian-dylib` running on `gribozavr4` while building `llvm` at step 8 "test-build-unified-tree-check-lld".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/60/builds/12474

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 8 (test-build-unified-tree-check-lld) failure: test (failure)
******************** TEST 'lld :: ELF/ppc64-local-exec-tls.s' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 2: /b/1/llvm-x86_64-debian-dylib/build/bin/llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux /b/1/llvm-x86_64-debian-dylib/llvm-project/lld/test/ELF/ppc64-local-exec-tls.s -o /b/1/llvm-x86_64-debian-dylib/build/tools/lld/test/ELF/Output/ppc64-local-exec-tls.s.tmp.o
+ /b/1/llvm-x86_64-debian-dylib/build/bin/llvm-mc -filetype=obj -triple=powerpc64le-unknown-linux /b/1/llvm-x86_64-debian-dylib/llvm-project/lld/test/ELF/ppc64-local-exec-tls.s -o /b/1/llvm-x86_64-debian-dylib/build/tools/lld/test/ELF/Output/ppc64-local-exec-tls.s.tmp.o
/b/1/llvm-x86_64-debian-dylib/llvm-project/lld/test/ELF/ppc64-local-exec-tls.s:65:3: error: invalid operand for instruction
  ld 3, b at tprel, 13
  ^
/b/1/llvm-x86_64-debian-dylib/llvm-project/lld/test/ELF/ppc64-local-exec-tls.s:74:3: error: invalid operand for instruction
  ld 3, b at tprel@l, 13
  ^

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/114277