[LLVM] Move Chad Rosier to inactive maintainers

Chad has not been involved with LLVM for more than five years, so
move him to the inactive maintainers.

Unfortunately, there doesn't seem to be a clear person to take up
FastISel maintainership.

Author: nikic

llvm/Maintainers.md

@@ -126,11 +126,6 @@ [email protected] (email), [RKSimon](https://github.com/RKSimon) (GitHub) \
 Craig Topper \
 [email protected] (email), [topperc](https://github.com/topperc) (GitHub)
 
-#### FastISel
-
-Chad Rosier \
-[email protected] (email)
-
 #### Instruction scheduling
 
 Matthias Braun \
@@ -461,6 +456,7 @@ Justin Bogner ([email protected], [bogner](https://github.com/bogner)) -- Se
 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 \
+Chad Rosier ([email protected]) -- FastISel \
 Hans Wennborg ([email protected], [zmodem](https://github.com/zmodem)) -- Release management \
 Kostya Serebryany ([kcc](https://github.com/kcc)) -- Sanitizers \
 Evgeniy Stepanov ([eugenis](https://github.com/eugenis)) -- Sanitizers