MAINTAINERS: introduce the Microchip RISC-V Platforms area

This commit introduces the `Microchip RISC-V Platforms` area. This area
coveres the following current Zephyr targets:
* `m2gl025_miv`
* `mpfs_icicle`

Signed-off-by: Filip Kokosinski <fkokosinski@antmicro.com>

MAINTAINERS.yml

@@ -3524,6 +3524,20 @@ Microchip MEC Platforms:
  labels:
  - "platform: Microchip MEC"
 
+Microchip RISC-V Platforms:
+ status: maintained
+ maintainers:
+ - fkokosinski
+ - kgugala
+ - tgorochowik
+ files:
+ - boards/microchip/m2gl025_miv/
+ - boards/microchip/mpfs_icicle/
+ - dts/riscv/microchip/
+ - soc/microchip/miv/
+ labels:
+ - "platform: Microchip RISC-V"
+
 Microchip SAM Platforms:
  status: maintained
  maintainers: