[PARISC] Clean up asm-parisc/serial.h

Russell King pointed out that asm/serial.h is anachronistic and we were
misusing BASE_BAUD.  So fix BASE_BAUD for PCI 16550 UARTs, move LASI_BASE_BAUD
into 8250_gsc, and fix the obsolete comment about reserving serial port slots.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
diff --git a/drivers/serial/8250_gsc.c b/drivers/serial/8250_gsc.c
index 1ebe6b5..c5d0add 100644
--- a/drivers/serial/8250_gsc.c
+++ b/drivers/serial/8250_gsc.c
@@ -22,7 +22,6 @@
 #include <asm/hardware.h>
 #include <asm/parisc-device.h>
 #include <asm/io.h>
-#include <asm/serial.h> /* for LASI_BASE_BAUD */
 
 #include "8250.h"
 
@@ -54,7 +53,8 @@
 
 	memset(&port, 0, sizeof(port));
 	port.iotype	= UPIO_MEM;
-	port.uartclk	= LASI_BASE_BAUD * 16;
+	/* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
+	port.uartclk	= 7272727;
 	port.mapbase	= address;
 	port.membase	= ioremap_nocache(address, 16);
 	port.irq	= dev->irq;