clock: qcom: ipq4019: add ESS clock

ESS clock is the Ethernet Subsystem clock, so lets add it as its
already configured by SBL1.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>

drivers/clk/qcom/clock-ipq4019.c

@@ -64,6 +64,9 @@ static int ipq4019_clk_enable(struct clk *clk)
 	case GCC_USB2_MOCK_UTMI_CLK:
 		/* These clocks is already initialized by SBL1 */
 		return 0;
+	case GCC_ESS_CLK:
+		/* This clock is already initialized by SBL1 */
+		return 0;
 	default:
 		return -EINVAL;
 	}