dmaengine: ti: edma: Add some null pointer checks to the edma_probe

mainline inclusion
from mainline-v6.8-rc3
commit 6e2276203ac9ff10fc76917ec9813c660f627369
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9E2MP
CVE: CVE-2024-26771

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6e2276203ac9ff10fc76917ec9813c660f627369



--------------------------------

devm_kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure. Ensure the allocation was successful
by checking the pointer validity.

Signed-off-by: Kunwu Chan <chentao@kylinos.cn>
Link: https://lore.kernel.org/r/20240118031929.192192-1-chentao@kylinos.cn


Signed-off-by: Vinod Koul <vkoul@kernel.org>
Conflicts:
	drivers/dma/ti/edma.c
Signed-off-by: GUO Zihua <guozihua@huawei.com>