rockchip: Streamline and complete UARTn_BASE macros.

In order to set the UART base during bootup in common code of
plat/rockchip, we need to streamline the way the UART base addresses
are defined and add the missing definitions and mappings.

This patch does so by following the pattern UARTn_BASE, which is
already in use on RK3399 and RK3328. The numbering itself is derived
from the upstream Linux DTS files of the individual SoCs.

Signed-off-by: Christoph Müllner <christophm30@gmail.com>
Change-Id: I341a1996f4ceed5f82a2f6687d4dead9d7cc5c1f
diff --git a/plat/rockchip/rk3288/include/platform_def.h b/plat/rockchip/rk3288/include/platform_def.h
index d9e0bc6..e24aeff 100644
--- a/plat/rockchip/rk3288/include/platform_def.h
+++ b/plat/rockchip/rk3288/include/platform_def.h
@@ -87,7 +87,7 @@
 #define PLAT_RK_GICD_BASE		RK3288_GICD_BASE
 #define PLAT_RK_GICC_BASE		RK3288_GICC_BASE
 
-#define PLAT_RK_UART_BASE		RK3288_UART2_BASE
+#define PLAT_RK_UART_BASE		UART2_BASE
 #define PLAT_RK_UART_CLOCK		RK3288_UART_CLOCK
 #define PLAT_RK_UART_BAUDRATE		RK3288_BAUDRATE