[ARM] omap: improve is_omap_port()

Make is_omap_port() take the uart_8250_port structure so it can do
whatever test it desires.  Convert the test to compare the physical
addresses rather than virtual addresses.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/plat-omap/include/mach/serial.h

@@ -32,10 +32,10 @@
 #define OMAP16XX_BASE_BAUD	(48000000/16)
 #define OMAP24XX_BASE_BAUD	(48000000/16)
 
-#define is_omap_port(p)	({int __ret = 0;			\
-			if (p == IO_ADDRESS(OMAP_UART1_BASE) ||	\
-			    p == IO_ADDRESS(OMAP_UART2_BASE) ||	\
-			    p == IO_ADDRESS(OMAP_UART3_BASE))	\
+#define is_omap_port(pt)	({int __ret = 0;			\
+			if ((pt)->port.mapbase == OMAP_UART1_BASE ||	\
+			    (pt)->port.mapbase == OMAP_UART2_BASE ||	\
+			    (pt)->port.mapbase == OMAP_UART3_BASE)	\
 				__ret = 1;				\
 			__ret;						\
 			})

drivers/serial/8250.c

@@ -2209,7 +2209,7 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios,
 
 #ifdef CONFIG_ARCH_OMAP15XX
 	/* Workaround to enable 115200 baud on OMAP1510 internal ports */
-	if (cpu_is_omap1510() && is_omap_port((unsigned int)up->port.membase)) {
+	if (cpu_is_omap1510() && is_omap_port(up)) {
 		if (baud == 115200) {
 			quot = 1;
 			serial_out(up, UART_OMAP_OSC_12M_SEL, 1);