[llvm] [PowerPC] Update maintainers (PR #149171)

[via llvm-commits]

https://github.com/RolandF77 created https://github.com/llvm/llvm-project/pull/149171

Proposed list of maintainers for PPC BE. One entry is for the llvmonpower list, which may be unorthodox. Let me know if it is a problem.

>From 7ee69c8873a34b0686690d0c908f575d9c1a700d Mon Sep 17 00:00:00 2001
From: Roland Froese <froese at ca.ibm.com>
Date: Wed, 16 Jul 2025 18:14:08 +0000
Subject: [PATCH] update ppc maintainers

---
 llvm/Maintainers.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/llvm/Maintainers.md b/llvm/Maintainers.md
index 9a7eb344ad4fb..f313d2aae343a 100644
--- a/llvm/Maintainers.md
+++ b/llvm/Maintainers.md
@@ -263,6 +263,20 @@ amaclean at nvidia.com (email), [AlexMaclean](https://github.com/AlexMaclean) (GitH
 
 #### PowerPC backend
 
+Amy Kwan (esp. release issues) \
+Amy.Kwan1 at ibm.com (email), [amy-kwan](https://github.com/amy-kwan) (GitHub) \
+Lei Huang \
+lei at ca.ibm.com (email), [lei137](https://github.com/lei137) (GitHub) \
+Sean Fertile (esp. ABI/ELF/XCOFF) \
+sfertile at ca.ibm.com (email), [mandlebug](https://github.com/mandlebug) (GitHub) \
+Zhijian Lin \
+zhijian at ca.ibm.com (email), [diggerlin](https://github.com/diggerlin) (GitHub) \
+Maryam Moghadas \
+maryammo at ca.ibm.com (email), [maryammo](https://github.com/maryammo) (GitHub) \
+Roland Froese \
+froese at ca.ibm.com (email), [RolandF77](https://github.com/RolandF77) (GitHub) \
+llvmonpower \
+powerllvm at ca.ibm.com (email), [llvmonpower](https://github.com/llvmonpower) (GitHub)
 
 #### RISCV backend