interconnect : samsung: exynos: Add NULL check in exynos_generic_icc_probe devm_kasprintf() can return a NULL pointer on failure, but "icc_node->name" returned value in exynos_generic_icc_probe is not checked. Add NULL check in exynos_generic_icc_probe, to handle kernel NULL pointer dereference error. This is similar to the commit 050b23d081da.