PMB originally comes from BCM63138 but can be also found on many other chipsets (e.g. BCM4908). It's needed to power on and off SoC blocks like PCIe, SATA, USB. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>