sh: Fix up build fallout from serial merge.

This fixes up build issues for SH7720/SH7722/SH7750 that crept in with
the serial rework.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/kernel/cpu/sh3/serial-sh7720.c

@@ -2,6 +2,7 @@
 #include <linux/serial_core.h>
 #include <linux/io.h>
 #include <cpu/serial.h>
+#include <asm/gpio.h>
 
 static void sh7720_sci_init_pins(struct uart_port *port, unsigned int cflag)
 {

arch/sh/kernel/cpu/sh4/setup-sh7750.c

@@ -38,7 +38,7 @@ static struct platform_device rtc_device = {
 
 static struct plat_sci_port sci_platform_data = {
 	.mapbase	= 0xffe00000,
-	.port_reg	= 0xffe0001C
+	.port_reg	= 0xffe0001C,
 	.flags		= UPF_BOOT_AUTOCONF,
 	.scscr		= SCSCR_TE | SCSCR_RE,
 	.scbrr_algo_id	= SCBRR_ALGO_2,

arch/sh/kernel/cpu/sh4a/setup-sh7722.c

@@ -22,6 +22,7 @@
 
 #include <cpu/dma-register.h>
 #include <cpu/sh7722.h>
+#include <cpu/serial.h>
 
 static const struct sh_dmae_slave_config sh7722_dmae_slaves[] = {
 	{