dt-bindings: phy: Convert Broadcom SATA PHY to YAML

Update the Broadcom SATA PHY Device Tree binding to a YAML format.

Suggested-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20201204193532.1934108-1-f.fainelli@gmail.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>