MAINTAINERS: Add Stefan Markovic as a MIPS reviewer

Add Stefan Markovic as a MIPS reviewer. He had several key
contributions to QEMU for MIPS this year. He is a meticulous
person with the ability to think and act on many levels.
Reviewed-by: NStefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: NAleksandar Markovic <amarkovic@wavecomp.com>

MAINTAINERS

@@ -190,6 +190,7 @@ F: disas/microblaze.c
 MIPS
 M: Aurelien Jarno <aurelien@aurel32.net>
 M: Aleksandar Markovic <amarkovic@wavecomp.com>
+R: Stefan Markovic <smarkovic@wavecomp.com>
 S: Maintained
 F: target/mips/
 F: hw/mips/
@@ -336,6 +337,7 @@ F: target/arm/kvm.c
 
 MIPS
 M: James Hogan <jhogan@kernel.org>
+R: Stefan Markovic <smarkovic@wavecomp.com>
 S: Maintained
 F: target/mips/kvm.c
 
@@ -741,27 +743,32 @@ MIPS Machines
 -------------
 Jazz
 M: Hervé Poussineau <hpoussin@reactos.org>
+R: Stefan Markovic <smarkovic@wavecomp.com>
 S: Maintained
 F: hw/mips/mips_jazz.c
 
 Malta
 M: Aurelien Jarno <aurelien@aurel32.net>
+R: Stefan Markovic <smarkovic@wavecomp.com>
 S: Maintained
 F: hw/mips/mips_malta.c
 
 Mipssim
 M: Aleksandar Markovic <amarkovic@wavecomp.com>
+R: Stefan Markovic <smarkovic@wavecomp.com>
 S: Odd Fixes
 F: hw/mips/mips_mipssim.c
 F: hw/net/mipsnet.c
 
 R4000
 M: Aurelien Jarno <aurelien@aurel32.net>
+R: Stefan Markovic <smarkovic@wavecomp.com>
 S: Maintained
 F: hw/mips/mips_r4k.c
 
 Fulong 2E
 M: Aleksandar Markovic <amarkovic@wavecomp.com>
+R: Stefan Markovic <smarkovic@wavecomp.com>
 S: Odd Fixes
 F: hw/mips/mips_fulong2e.c
 F: hw/isa/vt82c686.c
@@ -770,6 +777,7 @@ F: include/hw/isa/vt82c686.h
 
 Boston
 M: Paul Burton <pburton@wavecomp.com>
+R: Stefan Markovic <smarkovic@wavecomp.com>
 S: Maintained
 F: hw/core/loader-fit.c
 F: hw/mips/boston.c
@@ -1992,6 +2000,7 @@ F: disas/i386.c
 
 MIPS target
 M: Aurelien Jarno <aurelien@aurel32.net>
+R: Stefan Markovic <smarkovic@wavecomp.com>
 S: Maintained
 F: tcg/mips/
 F: disas/mips.c