dm: serial: Tidy up the pl01x driver

Adjust the driver so that leaf functions take a pointer to the serial port
register base. Put all the global configuration in the init function, and
use the same settings from then on.

This makes it much easier to move to driver model without duplicating the
code, since with driver model we use platform data rather than global
settings.

The driver is compiled with either the CONFIG_PL010_SERIAL or
CONFIG_PL011_SERIAL option and this determines the uart type. With driver
model this needs to come in from platform data, so create a new
CONFIG_PL01X_SERIAL config which brings in the driver, and adjust the
driver to support both peripheral variants.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>

include/serial_pl01x.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __serial_pl01x_h
+#define __serial_pl01x_h
+
+enum pl01x_type {
+	TYPE_PL010,
+	TYPE_PL011,
+};
+
+/*
+ *Information about a serial port
+ *
+ * @base: Register base address
+ * @type: Port type
+ * @clock: Input clock rate, used for calculating the baud rate divisor
+ */
+struct pl01x_serial_platdata {
+	unsigned long base;
+	enum pl01x_type type;
+	unsigned int clock;
+};
+
+#endif