MAINTAINERS: Add RISC-V

RISC-V needs a MAINTAINERS entry. Let's add one.
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>

MAINTAINERS

@@ -11501,6 +11501,16 @@ S:	Maintained
 F:	drivers/mtd/nand/r852.c
 F:	drivers/mtd/nand/r852.h
 
+RISC-V ARCHITECTURE
+M:	Palmer Dabbelt <palmer@sifive.com>
+M:	Albert Ou <albert@sifive.com>
+L:	patches@groups.riscv.org
+T:	git https://github.com/riscv/riscv-linux
+S:	Supported
+F:	arch/riscv/
+K:	riscv
+N:	riscv
+
 ROCCAT DRIVERS
 M:	Stefan Achatz <erazor_de@users.sourceforge.net>
 W:	http://sourceforge.net/projects/roccat/