pl011: 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: I7a23327394d142af4b293ea7ccd90b843c54587c
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/plat/hisilicon/poplar/bl2_plat_setup.c b/plat/hisilicon/poplar/bl2_plat_setup.c
index cc9d975..482935c 100644
--- a/plat/hisilicon/poplar/bl2_plat_setup.c
+++ b/plat/hisilicon/poplar/bl2_plat_setup.c
@@ -25,7 +25,7 @@
 #include "plat_private.h"
 
 static meminfo_t bl2_tzram_layout __aligned(CACHE_WRITEBACK_GRANULE);
-static console_pl011_t console;
+static console_t console;
 
 /*******************************************************************************
  * Transfer SCP_BL2 from Trusted RAM using the SCP Download protocol.