rockchip: px30: add uart5 as option for serial output

The px30 mini-evb can use either uart2 (muxed with the sd-card pins) or
uart5 via its pin header for serial output. Uart5 is especially useful
when needing to boot from the sd-card, where uart2 obviously is not
useable.

So add the uart5 constants and it as uart option for the serial-param
handler.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Change-Id: Ib88df7a55d761ee104d312c9953a13de3beba1c4

plat/rockchip/common/params_setup.c

@@ -95,6 +95,11 @@ static void plat_rockchip_dt_process_fdt_uart(void *fdt)
 	case 4:
 		uart_base = UART4_BASE;
 		break;
+#endif
+#ifdef UART5_BASE
+	case 5:
+		uart_base = UART5_BASE;
+		break;
 #endif
 	default:
 		return;

plat/rockchip/px30/px30_def.h

@@ -54,6 +54,9 @@
 #define UART2_BASE		0xff160000
 #define UART2_SIZE		SIZE_K(64)
 
+#define UART5_BASE		0xff178000
+#define UART5_SIZE		SIZE_K(64)
+
 #define I2C0_BASE		0xff180000
 #define I2C0_SIZE		SIZE_K(64)