Checking for 'ramp_delay = 0' to avoid Coverity warning report.
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Link: https://lore.kernel.org/r/1592920870-12693-1-git-send-email-yibin.gong@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>