arm: Remove edb9315a board

These boards have not been converted to CONFIG_DM_USB by the deadline
and is also missing conversion to CONFIG_DM.  Remove it.

This is also the last PL010_SERIAL using board, so remove those
references.

Cc: Sergey Kostanbaev <sergey.kostanbaev@fairwaves.ru>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/serial/serial_pl01x.c b/drivers/serial/serial_pl01x.c
index 5283d5e..76b96ad 100644
--- a/drivers/serial/serial_pl01x.c
+++ b/drivers/serial/serial_pl01x.c
@@ -191,9 +191,7 @@
 {
 	int clock = 0;
 
-#if defined(CONFIG_PL010_SERIAL)
-	pl01x_type = TYPE_PL010;
-#elif defined(CONFIG_PL011_SERIAL)
+#if defined(CONFIG_PL011_SERIAL)
 	pl01x_type = TYPE_PL011;
 	clock = CONFIG_PL011_CLOCK;
 #endif