Merge tag 'arm-soc/for-5.17/maintainers' of https://github.com/Broadcom/stblinux into arm/soc

This pull request contains MAINTAINERS file sections updates for
Broadcom SoCs for v5.17, please pull the following:

- Rafal updates the BCM5301X and BCM53573 SoCs sections to list Florian
as second mainainer

* tag 'arm-soc/for-5.17/maintainers' of https://github.com/Broadcom/stblinux:
  MAINTAINERS: Add Florian as BCM5301X and BCM53573 maintainer