memory: emif: check the pointer temp in get_device_details()

The pointer temp is allocated by devm_kzalloc(), so it should be
checked for error handling.

Fixes: 7ec94453 ("memory: emif: add basic infrastructure for EMIF driver")
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Link: https://lore.kernel.org/r/20220225132552.27894-1-baijiaju1990@gmail.com


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>