ARM: OMAP5: add UART4 support

Add UART4 base address.

Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il>

arch/arm/include/asm/arch-omap5/omap.h

@@ -50,6 +50,7 @@
 #define UART1_BASE		(OMAP54XX_L4_PER_BASE + 0x6a000)
 #define UART2_BASE		(OMAP54XX_L4_PER_BASE + 0x6c000)
 #define UART3_BASE		(OMAP54XX_L4_PER_BASE + 0x20000)
+#define UART4_BASE		(OMAP54XX_L4_PER_BASE + 0x6e000)
 
 /* General Purpose Timers */
 #define GPT1_BASE		(OMAP54XX_L4_WKUP_BASE + 0x18000)