serial: Add SERIAL_SH_SCI_NR_UARTS for sh-sci.

sh-sci needs to be able to define its number of ports to
support, we do this with a config option, like most other
ports do.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

include/asm-sh/sci.h

@@ -0,0 +1,34 @@
+#ifndef __ASM_SH_SCI_H
+#define __ASM_SH_SCI_H
+
+#include <linux/serial_core.h>
+
+/*
+ * Generic header for SuperH SCI(F)
+ *
+ * Do not place SH-specific parts in here, sh64 and h8300 depend on this too.
+ */
+
+/* Offsets into the sci_port->irqs array */
+enum {
+	SCIx_ERI_IRQ,
+	SCIx_RXI_IRQ,
+	SCIx_TXI_IRQ,
+	SCIx_BRI_IRQ,
+	SCIx_NR_IRQS,
+};
+
+/*
+ * Platform device specific platform_data struct
+ */
+struct plat_sci_port {
+	void __iomem	*membase;		/* io cookie */
+	unsigned long	mapbase;		/* resource base */
+	unsigned int	irqs[SCIx_NR_IRQS];	/* ERI, RXI, TXI, BRI */
+	unsigned int	type;			/* SCI / SCIF / IRDA */
+	upf_t		flags;			/* UPF_* flags */
+};
+
+int early_sci_setup(struct uart_port *port);
+
+#endif /* __ASM_SH_SCI_H */