egl: Rename _eglAddDevice() to _eglFindDevice()

_eglAddDevice() is now only used to look up eglDevices,
which means that the function name is a bit misleading.

Since this function is only used for finding the
eglDevice, it should also no longer support adding
a device to the egl devices list.

Signed-off-by: Robert Foss <rfoss@kernel.org>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23742>

src/egl/main/egldevice.c

@@ -183,6 +183,16 @@ _eglFindDevice(int fd, bool software)
       dev = NULL;
       goto out;
    }
+
+   while (dev->Next) {
+      dev = dev->Next;
+
+      if (_eglDeviceSupports(dev, _EGL_DEVICE_DRM) &&
+          drmDevicesEqual(device, dev->device) != 0) {
+         goto out;
+      }
+   }
+
 #else
    _eglLog(_EGL_FATAL,
            "Driver bug: Built without libdrm, yet looking for HW device");