serial: 8250/omap1: include linux/soc/ti/omap1-soc.h

As a preparation for cleaning up the omap1 headers, start
including linux/soc/ti/omap1-soc.h directly so we can
keep calling cpu_is_omap1510().
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/tty/serial/8250/8250.h

@@ -259,6 +259,7 @@ static inline int fintek_8250_probe(struct uart_8250_port *uart) { return 0; }
 #endif
 
 #ifdef CONFIG_ARCH_OMAP1
+#include <linux/soc/ti/omap1-soc.h>
 static inline int is_omap1_8250(struct uart_8250_port *pt)
 {
 	int res;