global: Use proper project name U-Boot (next)

Use proper project name in DTs, messages and READMEs.

Signed-off-by: Michal Simek <michal.simek@amd.com>
diff --git a/board/freescale/common/fsl_chain_of_trust.c b/board/freescale/common/fsl_chain_of_trust.c
index b47ce05..87ed814 100644
--- a/board/freescale/common/fsl_chain_of_trust.c
+++ b/board/freescale/common/fsl_chain_of_trust.c
@@ -127,7 +127,7 @@
 				   &img_addr);
 
 	if (res == 0)
-		printf("SPL: Validation of U-boot successful\n");
+		printf("SPL: Validation of U-Boot successful\n");
 }
 
 #ifdef CONFIG_SPL_FRAMEWORK