ARM: dts: bcm21664/23550: use CCU compatibles directly

BCM21664 and BCM23550 DTs for some reason use constants from a header file
for their CCU node compatibles. Change these to use the strings directly.

Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com>
Link: https://lore.kernel.org/r/65c54bd4076d646623d2a2f518631435522dc628.1685127525.git.stano.jakubek@gmail.com


Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>