rockchip: clk: add watchdog clock to px30_clk_enable

Add the PCLK_WDT_NS clock to px30_clk_enable so that the watchdog driver
can probe since it wants to enable this clock.

Cc: Quentin Schulz <foss+uboot@0leil.net>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

drivers/clk/rockchip/clk_px30.c

@@ -1415,6 +1415,9 @@ static int px30_clk_enable(struct clk *clk)
 	case SCLK_GMAC_RMII:
 		/* Required to successfully probe the Designware GMAC driver */
 		return 0;
+	case PCLK_WDT_NS:
+		/* Required to successfully probe the Designware watchdog driver */
+		return 0;
 	}
 
 	debug("%s: unsupported clk %ld\n", __func__, clk->id);