firmware: xilinx: Register event manager driver

Use family code in order to register event manager
driver for Versal and Versal NET platforms, instead
of using compatible string.

Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com>
Link: https://lore.kernel.org/r/20231129112713.22718-4-jay.buddhabhatti@amd.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>