sh: rts7751r2d board updates.

This tidies up some of the rts7751r2d mess and gets it booting
again. Update the defconfig, too.

Signed-off-by: Masayuki Hosokawa <hosokawa@ace-jp.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/serial.h b/include/asm-sh/serial.h
index 4ac0e78..21f6d33 100644
--- a/include/asm-sh/serial.h
+++ b/include/asm-sh/serial.h
@@ -29,10 +29,7 @@
 
 #else
 
-#define SERIAL_PORT_DFNS			\
-	/* UART CLK   PORT IRQ     FLAGS        */			\
-	{ 0, BASE_BAUD, 0x3F8, 4, STD_COM_FLAGS },	/* ttyS0 */	\
-	{ 0, BASE_BAUD, 0x2F8, 3, STD_COM_FLAGS }	/* ttyS1 */
+#define SERIAL_PORT_DFNS
 
 #endif