MAINTAINERS: add entry for polarfire soc mailbox

Add Lewis Hanly as a maintainer for the Microchip SoC
directory and the system services mailbox driver

Signed-off-by: Conor Dooley <[email protected]>
Signed-off-by: Jassi Brar <[email protected]>

Author: ConchuOD

MAINTAINERS

@@ -15706,6 +15706,14 @@ F:	arch/riscv/
 N:	riscv
 K:	riscv
 
+RISC-V/MICROCHIP POLARFIRE SOC SUPPORT
+M:	Lewis Hanly <[email protected]>
+L:	[email protected]
+S:	Supported
+F:	drivers/mailbox/mailbox-mpfs.c
+F:	drivers/soc/microchip/
+F:	include/soc/microchip/mpfs.h
+
 RNBD BLOCK DRIVERS
 M:	Md. Haris Iqbal <[email protected]>
 M:	Jack Wang <[email protected]>