[LLVM] Update ARM maintainers (#117002)

Move rengolin and asl to former maintainers, and add davemgreen,
ostannard, nasherm, smithp35 and stuji from ARM as current
maintainers (with a focus area for some).

Author: nikic

llvm/Maintainers.md

@@ -180,8 +180,16 @@ [email protected] (email), [markschimmel](https://github.com/markschimmel) (Gi
 
 #### ARM backend
 
-Renato Golin \
-[email protected] (email), [rengolin](https://github.com/rengolin) (GitHub)
+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
 
@@ -406,11 +414,6 @@ [email protected] (email), [echristo](https://github.com/echristo) (GitHub)
 Anton Korobeynikov \
 [email protected] (email), [asl](https://github.com/asl) (GitHub)
 
-#### ARM EABI
-
-Anton Korobeynikov \
-[email protected] (email), [asl](https://github.com/asl) (GitHub)
-
 #### LLVM Buildbot
 
 Galina Kistanova \
@@ -470,6 +473,8 @@ [email protected] (email), [lattner](https://github.com/lattner) (GitHub), clattn
 
 Justin Bogner ([email protected], [bogner](https://github.com/bogner)) -- SelectionDAG \
 Evan Cheng ([email protected]) -- Parts of code generator not covered by someone else \
+Renato Golin ([email protected], [rengolin](https://github.com/rengolin)) -- ARM backend \
+Anton Korobeynikov ([email protected], [asl](https://github.com/asl)) -- ARM EABI \
 Hans Wennborg ([email protected], [zmodem](https://github.com/zmodem)) -- Release management \
 
 ### Former maintainers of removed components