MAINTAINERS: Update Atmel entries

Update Atmel related rules to keep consistent.

Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>

MAINTAINERS.yml

@@ -3383,10 +3383,9 @@ Microchip SAM Platforms:
  - mnkp
  - stephanosio
  files:
- - boards/arm/atsam*/
- - boards/arm/sam*/
+ - boards/atmel/
  - dts/arm/atmel/
- - soc/arm/atmel_sam*/
+ - soc/atmel/
  - drivers/*/*sam*.c
  - dts/bindings/*/atmel,*
  labels: