drivers/usb: Avoid NULL pointer dereference

Coverity detects dereferencing pointers that might be "NULL" when
calling acpigen_write_scope and acpigen_write_device. Add sanity
check for both of scope and name to prevent NULL pointer dereference.

Found-by: Coverity CID 1430454
TEST=Built and boot up to kernel on Volteer.

Signed-off-by: John Zhao <john.zhao@intel.com>
Change-Id: I8ece3831bbd2641ceafbd71b9dc3db7e04a8eae4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43449
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions