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/arch/arm/dts/uniphier-ph1-ld4-ref.dts b/arch/arm/dts/uniphier-ph1-ld4-ref.dts
index 469bd05..f62916d 100644
--- a/arch/arm/dts/uniphier-ph1-ld4-ref.dts
+++ b/arch/arm/dts/uniphier-ph1-ld4-ref.dts
@@ -59,7 +59,7 @@
 	status = "okay";
 };
 
-/* for U-boot only */
+/* for U-Boot only */
 / {
 	soc {
 		u-boot,dm-pre-reloc;
diff --git a/arch/arm/dts/uniphier-ph1-ld6b-ref.dts b/arch/arm/dts/uniphier-ph1-ld6b-ref.dts
index e0a972f..dca408b 100644
--- a/arch/arm/dts/uniphier-ph1-ld6b-ref.dts
+++ b/arch/arm/dts/uniphier-ph1-ld6b-ref.dts
@@ -61,7 +61,7 @@
 	status = "okay";
 };
 
-/* for U-boot only */
+/* for U-Boot only */
 / {
 	soc {
 		u-boot,dm-pre-reloc;
diff --git a/arch/arm/dts/uniphier-ph1-pro4-ref.dts b/arch/arm/dts/uniphier-ph1-pro4-ref.dts
index 02e74a7..202a642 100644
--- a/arch/arm/dts/uniphier-ph1-pro4-ref.dts
+++ b/arch/arm/dts/uniphier-ph1-pro4-ref.dts
@@ -66,7 +66,7 @@
 	status = "okay";
 };
 
-/* for U-boot only */
+/* for U-Boot only */
 / {
 	soc {
 		u-boot,dm-pre-reloc;
diff --git a/arch/arm/dts/uniphier-ph1-pro5-4kbox.dts b/arch/arm/dts/uniphier-ph1-pro5-4kbox.dts
index d46e827..02a3362 100644
--- a/arch/arm/dts/uniphier-ph1-pro5-4kbox.dts
+++ b/arch/arm/dts/uniphier-ph1-pro5-4kbox.dts
@@ -47,7 +47,7 @@
 	status = "okay";
 };
 
-/* for U-boot only */
+/* for U-Boot only */
 / {
 	soc {
 		u-boot,dm-pre-reloc;
diff --git a/arch/arm/dts/uniphier-ph1-sld3-ref.dts b/arch/arm/dts/uniphier-ph1-sld3-ref.dts
index 1f3aee9..ff17945 100644
--- a/arch/arm/dts/uniphier-ph1-sld3-ref.dts
+++ b/arch/arm/dts/uniphier-ph1-sld3-ref.dts
@@ -68,7 +68,7 @@
 	status = "okay";
 };
 
-/* for U-boot only */
+/* for U-Boot only */
 &serial0 {
        u-boot,dm-pre-reloc;
 };
diff --git a/arch/arm/dts/uniphier-ph1-sld8-ref.dts b/arch/arm/dts/uniphier-ph1-sld8-ref.dts
index b58bf07..b5b6f65 100644
--- a/arch/arm/dts/uniphier-ph1-sld8-ref.dts
+++ b/arch/arm/dts/uniphier-ph1-sld8-ref.dts
@@ -63,7 +63,7 @@
 	status = "okay";
 };
 
-/* for U-boot only */
+/* for U-Boot only */
 / {
 	soc {
 		u-boot,dm-pre-reloc;
diff --git a/arch/arm/dts/uniphier-proxstream2-gentil.dts b/arch/arm/dts/uniphier-proxstream2-gentil.dts
index a49215e..c6c133a 100644
--- a/arch/arm/dts/uniphier-proxstream2-gentil.dts
+++ b/arch/arm/dts/uniphier-proxstream2-gentil.dts
@@ -49,7 +49,7 @@
 	status = "okay";
 };
 
-/* for U-boot only */
+/* for U-Boot only */
 / {
 	soc {
 		u-boot,dm-pre-reloc;
diff --git a/arch/arm/dts/uniphier-proxstream2-vodka.dts b/arch/arm/dts/uniphier-proxstream2-vodka.dts
index 63bd363..3703ad3 100644
--- a/arch/arm/dts/uniphier-proxstream2-vodka.dts
+++ b/arch/arm/dts/uniphier-proxstream2-vodka.dts
@@ -45,7 +45,7 @@
 	status = "okay";
 };
 
-/* for U-boot only */
+/* for U-Boot only */
 / {
 	soc {
 		u-boot,dm-pre-reloc;