drm/msm/dsi: Add missing check for alloc_ordered_workqueue

stable inclusion
from stable-v5.10.173
commit 540c66180afd59309a442d3bf1f2393464c8b4c5
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8BFR3

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=540c66180afd59309a442d3bf1f2393464c8b4c5



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[ Upstream commit 115906ca ]

Add check for the return value of alloc_ordered_workqueue as it may return
NULL pointer and cause NULL pointer dereference.

Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/517646/
Link: https://lore.kernel.org/r/20230110021651.12770-1-jiasheng@iscas.ac.cn


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>