MAINTAINERS: thead: add git tree

Add git tree for T-Head device tree files and, in the future, drivers for
the T-Head TH1520 SoC.

Signed-off-by: Drew Fustini <[email protected]>
Acked-by: Conor Dooley <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

Author: pdp7

MAINTAINERS

@@ -19313,6 +19313,7 @@ F:	arch/riscv/boot/dts/
 X:	arch/riscv/boot/dts/allwinner/
 X:	arch/riscv/boot/dts/renesas/
 X:	arch/riscv/boot/dts/sophgo/
+X:	arch/riscv/boot/dts/thead/
 
 RISC-V PMU DRIVERS
 M:	Atish Patra <[email protected]>
@@ -19329,6 +19330,7 @@ M:	Guo Ren <[email protected]>
 M:	Fu Wei <[email protected]>
 L:	[email protected]
 S:	Maintained
+T:	git https://github.com/pdp7/linux.git
 F:	arch/riscv/boot/dts/thead/
 
 RNBD BLOCK DRIVERS