global: Use proper project name U-Boot

Use proper project name in comments, Kconfig, readmes.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/0dbdf0432405c1c38ffca55703b6737a48219e79.1684307818.git.michal.simek@amd.com
diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
index d115fcf..d624589 100644
--- a/drivers/mtd/nand/raw/Kconfig
+++ b/drivers/mtd/nand/raw/Kconfig
@@ -553,7 +553,7 @@
 	bool "Enable use of 1st stage bootloader timing for NAND"
 	depends on NAND_ZYNQ
 	help
-	  This flag prevent U-boot reconfigure NAND flash controller and reuse
+	  This flag prevent U-Boot reconfigure NAND flash controller and reuse
 	  the NAND timing from 1st stage bootloader.
 
 config NAND_OCTEONTX
@@ -732,10 +732,10 @@
 	default 5 if HAS_NAND_SMALL_BADBLOCK_POS
 
 config SYS_NAND_U_BOOT_LOCATIONS
-	bool "Define U-boot binaries locations in NAND"
+	bool "Define U-Boot binaries locations in NAND"
 	help
 	Enable CONFIG_SYS_NAND_U_BOOT_OFFS though Kconfig.
-	This option should not be enabled when compiling U-boot for boards
+	This option should not be enabled when compiling U-Boot for boards
 	defining CONFIG_SYS_NAND_U_BOOT_OFFS in their include/configs/<board>.h
 	file.