16550: Use generic console_t data structure

Since now the generic console_t structure holds the UART base address as
well, let's use that generic location and drop the UART driver specific
data structure at all.

Change-Id: I5c2fe3b6a667acf80c808cfec4a64059a2c9c25f
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/plat/rpi/common/rpi3_common.c b/plat/rpi/common/rpi3_common.c
index ff33694..27281f2 100644
--- a/plat/rpi/common/rpi3_common.c
+++ b/plat/rpi/common/rpi3_common.c
@@ -102,7 +102,7 @@
 /*******************************************************************************
  * Function that sets up the console
  ******************************************************************************/
-static console_16550_t rpi3_console;
+static console_t rpi3_console;
 
 void rpi3_console_init(unsigned int base_clk_rate)
 {
@@ -123,7 +123,7 @@
 		panic();
 	}
 
-	console_set_scope(&rpi3_console.console, console_scope);
+	console_set_scope(&rpi3_console, console_scope);
 }
 
 /*******************************************************************************