powerpc: Move a bunch of ppc64 headers to include/asm-powerpc

... and also delete some that are no longer used because we already
had an include/asm-powerpc version of the header.

Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/include/asm-powerpc/serial.h b/include/asm-powerpc/serial.h
new file mode 100644
index 0000000..b273d63
--- /dev/null
+++ b/include/asm-powerpc/serial.h
@@ -0,0 +1,18 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#ifndef _ASM_POWERPC_SERIAL_H
+#define _ASM_POWERPC_SERIAL_H
+
+/*
+ * Serial ports are not listed here, because they are discovered
+ * through the device tree.
+ */
+
+/* Default baud base if not found in device-tree */
+#define BASE_BAUD ( 1843200 / 16 )
+
+#endif /* _PPC64_SERIAL_H */