irqchip/gic-v3-its: Remove unnecessary oom message

Fixes scripts/checkpatch.pl warning:
WARNING: Possible unnecessary 'out of memory' message

Remove it can help us save a bit of memory.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210609140643.14531-1-thunder.leizhen@huawei.com

drivers/irqchip/irq-gic-v3-its.c

@@ -4895,10 +4895,8 @@ static int its_init_vpe_domain(void)
 	entries = roundup_pow_of_two(nr_cpu_ids);
 	vpe_proxy.vpes = kcalloc(entries, sizeof(*vpe_proxy.vpes),
 				 GFP_KERNEL);
-	if (!vpe_proxy.vpes) {
-		pr_err("ITS: Can't allocate GICv4 proxy device array\n");
+	if (!vpe_proxy.vpes)
 		return -ENOMEM;
-	}
 
 	/* Use the last possible DevID */
 	devid = GENMASK(device_ids(its) - 1, 0);
@@ -5314,10 +5312,8 @@ static void __init acpi_table_parse_srat_its(void)
 
 	its_srat_maps = kmalloc_array(count, sizeof(struct its_srat_map),
 				      GFP_KERNEL);
-	if (!its_srat_maps) {
-		pr_warn("SRAT: Failed to allocate memory for its_srat_maps!\n");
+	if (!its_srat_maps)
 		return;
-	}
 
 	acpi_table_parse_entries(ACPI_SIG_SRAT,
 			sizeof(struct acpi_table_srat),