zynqmp: Remove usb init initialization for Kria

zynqmp: Remove usb init initialization for Kria

USB hub initialization is done by driver introduced by commit 09f557e106ef
("usb: onboard-hub: Add i2c initialization for usb5744 hub") that's why
there is no need to do initialization via variables.

Reported-by: Love Kumar <love.kumar@amd.com>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/96e9c80aeeed4e9664858bf236476997d17a9914.1734522042.git.michal.simek@amd.com