ANDROID: psci: Stash PSCI version in a static variable

Rather than probe the PSCI version dynamically whenever it is needed,
probe it once at bind/probe time and stash the result in a static
variable.

Bug: 209797374
Signed-off-by: Will Deacon <willdeacon@google.com>
Change-Id: I36673c19ee58ece7c2b6f18e7a2c015b5bd00c17
1 file changed