ARM: OMAP4: Add UART4 support

This patch adds UART4 support on OMAP4430 development platform.

Signed-off-by: Syed Rafiuddin <rafiuddin.syed@ti.com>
diff --git a/arch/arm/mach-omap2/board-4430sdp.c b/arch/arm/mach-omap2/board-4430sdp.c
index 57e477b..7e1e721 100644
--- a/arch/arm/mach-omap2/board-4430sdp.c
+++ b/arch/arm/mach-omap2/board-4430sdp.c
@@ -39,7 +39,7 @@
 };
 
 static struct omap_uart_config sdp4430_uart_config __initdata = {
-	.enabled_uarts	= (1 << 0) | (1 << 1) | (1 << 2),
+	.enabled_uarts	= (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3),
 };
 
 static struct omap_lcd_config sdp4430_lcd_config __initdata = {
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index b094c15..c0bea75 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -97,6 +97,16 @@
 		.regshift	= 2,
 		.uartclk	= OMAP24XX_BASE_BAUD * 16,
 	}, {
+#ifdef CONFIG_ARCH_OMAP4
+		.membase	= IO_ADDRESS(OMAP_UART4_BASE),
+		.mapbase	= OMAP_UART4_BASE,
+		.irq		= 70,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= OMAP24XX_BASE_BAUD * 16,
+	}, {
+#endif
 		.flags		= 0
 	}
 };