Use correct spelling of "U-Boot"

Correct spelling of "U-Boot" shall be used in all written text
(documentation, comments in source files etc.).

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/board/freescale/m5373evb/README b/board/freescale/m5373evb/README
index 52eac7b..582e0c3 100644
--- a/board/freescale/m5373evb/README
+++ b/board/freescale/m5373evb/README
@@ -46,7 +46,7 @@
 - include/asm-m68k/timer.h		Timer structure and definition
 - include/asm-m68k/types.h		Data types definition
 - include/asm-m68k/uart.h		Uart structure and definition
-- include/asm-m68k/u-boot.h		u-boot structure
+- include/asm-m68k/u-boot.h		U-Boot structure
 
 - include/configs/M5373EVB.h		Board specific configuration file
 
@@ -74,7 +74,7 @@
 CONFIG_SYS_MCFRTC_BASE		-- provide base address for RTC in immap.h
 CONFIG_SYS_RTC_OSCILLATOR	-- define RTC clock frequency
 RTC_DEBUG		-- define to show RTC debug message
-CONFIG_CMD_DATE		-- enable to use date feature in u-boot
+CONFIG_CMD_DATE		-- enable to use date feature in U-Boot
 
 CONFIG_MCFFEC		-- define to use common CF FEC driver
 CONFIG_MII		-- enable to use MII driver
@@ -117,7 +117,7 @@
 	SRAM:		0x80000000-0x8FFFFFFF (256MB)
 	IP:		0xF0000000-0xFFFFFFFF (256MB)
 
-2.2. For the initial bringup, we adopted a consistent memory scheme between u-boot and
+2.2. For the initial bringup, we adopted a consistent memory scheme between U-Boot and
 	linux kernel, you can customize it based on your system requirements:
 	Flash0:		0x00000000-0x00FFFFFF (16MB)