From: Wang Hai <redacted>
Date: Thu, 30 Jul 2020 15:24:19 +0800

platform_get_resource() may fail and return NULL, so we had better
check its return value to avoid a NULL pointer dereference a bit later
in the code. Fix it to use devm_platform_ioremap_resource_byname()
instead of calling platform_get_resource_byname() and devm_ioremap().

Fixes: 8425c41d1ef7 ("net: ll_temac: Extend support to non-device-tree platforms")
Reported-by: Hulk Robot <redacted>
Signed-off-by: Wang Hai <redacted>

Applied to net-next.