soc: qcom: rmtfs: Fix error code in probe()

Return an error code if of_property_count_u32_elems() fails.  Don't
return success.

Fixes: e656cd0b ("soc: qcom: rmtfs: Optionally map RMTFS to more VMs")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/76b21a14-70ff-4ca9-927d-587543c6699c@kili.mountain

drivers/soc/qcom/rmtfs_mem.c

@@ -233,6 +233,7 @@ static int qcom_rmtfs_mem_probe(struct platform_device *pdev)
 		num_vmids = 0;
 	} else if (num_vmids < 0) {
 		dev_err(&pdev->dev, "failed to count qcom,vmid elements: %d\n", num_vmids);
+		ret = num_vmids;
 		goto remove_cdev;
 	} else if (num_vmids > NUM_MAX_VMIDS) {
 		dev_warn(&pdev->dev,