EGL: Do not look up default namespace when sphal is defined

If sphal name space exists, try to load drivers from sphal.
This patch stops loading the driver if it fails to find the driver
from sphal, instead of falling back to the default namespace.

Bug: 38435840
Test: sailfish builds and boots
Change-Id: Ib8ba73f57aa25431c4a2efe7c61a3699237cc3d2
2 files changed