qseecom: check register listener syscall result

If smcinvoke based register listener syscall is not supported,
scm driver will return -EIO, then qseecom can change to use
legacy cmd to register listener again.

Change-Id: I232c900abab57e6aee735b92b4eb06d5fc66e66b
Signed-off-by: Zhen Kong <zkong@codeaurora.org>