rpi3: console: Use same "clock-less" setup scheme as RPi4

In the wake of the upcoming unification of the console setup code
between RPi3 and RPi4, extend the "clock-less" setup scheme to the
RPi3. This avoid programming any clocks or baud rate registers,
which makes the port more robust against GPU firmware changes.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Change-Id: Ida83a963bb18a878997e9cbd55f8ceac6a2e1c1f
diff --git a/plat/rpi/rpi3/include/platform_def.h b/plat/rpi/rpi3/include/platform_def.h
index e308f70..854da8f 100644
--- a/plat/rpi/rpi3/include/platform_def.h
+++ b/plat/rpi/rpi3/include/platform_def.h
@@ -249,9 +249,8 @@
 /*
  * Serial-related constants.
  */
-#define PLAT_RPI3_UART_BASE		RPI3_MINI_UART_BASE
-#define PLAT_RPI3_UART_CLK_IN_HZ	RPI3_MINI_UART_CLK_IN_HZ
-#define PLAT_RPI3_UART_BAUDRATE		ULL(115200)
+#define PLAT_RPI_MINI_UART_BASE		RPI3_MINI_UART_BASE
+#define PLAT_RPI_UART_BAUDRATE		ULL(115200)
 
 /*
  * System counter