MAINTAINERS: Add Andreas Larsson as co-maintainer for arch/sparc

Dave has not been very active on arch/sparc for the past two years.
I have been contributing to the SPARC32 port as well as maintaining
out-of-tree SPARC32 patches for LEON3/4/5 (SPARCv8 with CAS support)
since 2012. I am willing to step up as an arch/sparc (co-)maintainer.

For recent discussions on the matter, see [1] and [2].

[1] https://lore.kernel.org/r/[email protected]
[2] https://lore.kernel.org/r/[email protected]/

Signed-off-by: Andreas Larsson <[email protected]>
Suggested-by: Arnd Bergmann <[email protected]>
Acked-by: Sam Ravnborg <[email protected]>
Acked-by: John Paul Adrian Glaubitz <[email protected]>
Acked-by: Jose E. Marchesi <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

Author: andreas-gaisler

MAINTAINERS

@@ -20549,6 +20549,7 @@ F:	Documentation/translations/sp_SP/
 
 SPARC + UltraSPARC (sparc/sparc64)
 M:	"David S. Miller" <[email protected]>
+M:	Andreas Larsson <[email protected]>
 L:	[email protected]
 S:	Maintained
 Q:	http://patchwork.ozlabs.org/project/sparclinux/list/