ice: Add check for devm_kzalloc()

Add check for the return value of devm_kzalloc() to guarantee the success
of allocation.

Fixes: 42c2eb6b ("ice: Implement devlink-rate API")
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@gmail.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Link: https://patch.msgid.link/20250131013832.24805-1-jiashengjiangcool@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>