firmware: arm_ffa: Implement notification bitmap create and destroy interfaces

On systems without a hypervisor the responsibility of requesting the
creation of the notification bitmaps in the SPM falls to the FF-A driver.

We use FFA features to determine if the ABI is supported, if it is not
we can assume there is a hypervisor present and will take care of ensure
the relevant notifications bitmaps are created on this partitions behalf.

An endpoint’s notification bitmaps needs to be setup before it configures
its notifications and before other endpoints and partition managers can
start signaling these notifications.

Add interface to create and destroy the notification bitmaps and use the
same to do the necessary setup during the initialisation and cleanup
during the module exit.

Link: https://lore.kernel.org/r/20231005-ffa_v1-1_notif-v4-2-cddd3237809c@arm.com


Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>