[LLVM] Update AArch64 maintainers (#120440)

This merges the maintainer lists for the ARM and AArch64 backends,
as many people work on both to some degree. The list includes
focus areas where possible.

Author: nikic

llvm/Maintainers.md

@@ -169,10 +169,26 @@ [email protected] (email), [rnk](https://github.com/rnk) (GitHub)
 
 ### Backends / Targets
 
-#### AArch64 backend
+#### ARM and AArch64 backends
 
-Tim Northover \
-[email protected] (email), [TNorthover](https://github.com/TNorthover) (GitHub)
+David Green \
+[email protected] (email), [davemgreen](https://github.com/davemgreen) (GitHub) \
+Amara Emerson (esp. AArch64 GlobalISel) \
+[email protected] (email), [aemerson](https://github.com/aemerson) (GitHub) \
+Eli Friedman (esp. ARM64EC) \
+[email protected] (email), [efriedma-quic](https://github.com/efriedma-quic) (GitHub) \
+Sjoerd Meijer \
+[email protected] (email), [sjoerdmeijer](https://github.com/sjoerdmeijer) (GitHub) \
+Nashe Mncube \
+[email protected] (email), [nasherm](https://github.com/nasherm) (GitHub) \
+Sander de Smalen (esp. scalable vectorization/SVE/SME) \
+[email protected] (email), [sdesmalen-arm](https://github.com/sdesmalen-arm) (GitHub) \
+Peter Smith (Anything ABI) \
+[email protected] (email), [smithp35](https://github.com/smithp35) (GitHub) \
+Oliver Stannard (esp. assembly/dissassembly) \
+[email protected] (email), [ostannard](https://github.com/ostannard) (GitHub) \
+Ties Stuij (Arm GlobalISel and early arch support) \
+[email protected] (email), [stuij](https://github.com/stuij) (GitHub)
 
 #### AMDGPU backend
 
@@ -184,19 +200,6 @@ [email protected], [email protected] (email), [arsenm](https://github.co
 Mark Schimmel \
 [email protected] (email), [markschimmel](https://github.com/markschimmel) (GitHub)
 
-#### ARM backend
-
-David Green \
-[email protected] (email), [davemgreen](https://github.com/davemgreen) (GitHub) \
-Oliver Stannard (Especially assembly/dissassembly) \
-[email protected] (email), [ostannard](https://github.com/ostannard) (GitHub) \
-Nashe Mncube \
-[email protected] (email), [nasherm](https://github.com/nasherm) (GitHub) \
-Peter Smith (Anything ABI) \
-[email protected] (email), [smithp35](https://github.com/smithp35) (GitHub) \
-Ties Stuij (GlobalISel and early arch support) \
-[email protected] (email), [stuij](https://github.com/stuij) (GitHub)
-
 #### AVR backend
 
 Ben Shi \
@@ -480,6 +483,7 @@ James Grosbach ([email protected]) -- MC layer \
 Anton Korobeynikov ([email protected], [asl](https://github.com/asl)) -- ARM EABI, Windows codegen \
 Benjamin Kramer ([email protected], [d0k](https://github.com/d0k)) -- DWARF Parser \
 David Majnemer ([email protected], [majnemer](https://github.com/majnemer)) -- InstCombine, ConstantFold \
+Tim Northover ([email protected], [TNorthover](https://github.com/TNorthover)) -- AArch64 backend \
 Chad Rosier ([email protected]) -- FastISel \
 Hans Wennborg ([email protected], [zmodem](https://github.com/zmodem)) -- Release management \
 Kostya Serebryany ([kcc](https://github.com/kcc)) -- Sanitizers \