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/intel/soc/stratix10/bl2_plat_setup.c b/plat/intel/soc/stratix10/bl2_plat_setup.c
index 78ca253..d0c8e4c 100644
--- a/plat/intel/soc/stratix10/bl2_plat_setup.c
+++ b/plat/intel/soc/stratix10/bl2_plat_setup.c
@@ -50,7 +50,7 @@
 void bl2_el3_early_platform_setup(u_register_t x0, u_register_t x1,
 				u_register_t x2, u_register_t x4)
 {
-	static console_16550_t console;
+	static console_t console;
 	handoff reverse_handoff_ptr;
 
 	generic_delay_timer_init();