gpu/drm/msm: remove redundant pr_err() when devm_kzalloc failed

Line 1826 pr_err is redundant because memory alloc already
prints an error when failed.

Signed-off-by: Bernard Zhao <bernard@vivo.com>
Link: https://lore.kernel.org/r/20210202120552.14744-1-bernard@vivo.com


Signed-off-by: Rob Clark <robdclark@chromium.org>