staging: qlge: Remove multi-line dereference from ql_request_irq

Fix checkpatch.pl warning:

  WARNING: Avoid multiple line dereference - prefer 'qdev->flags'

Signed-off-by: Rylan Dmello <mail@rylan.coffee>
Link: https://lore.kernel.org/r/517d71f0cbc55e6880c19a9ff16c2c8ab8913251.1588209862.git.mail@rylan.coffee


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>