boot/uboot: fix typos

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit ab34bdcb38f950ac5232397e1168a9c1b66b2af4)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

boot/uboot/Config.in

@@ -150,7 +150,7 @@ config BR2_TARGET_UBOOT_DEFAULT_ENV_FILE
 	  Text file containing the variables to be used as the default
 	  environment in U-Boot.
 
-	  If empty, let U-Boot generate the default enviromnent from the
+	  If empty, let U-Boot generate the default environment from the
 	  source code and other U-Boot configuration values, which is
 	  the default behaviour.
 

boot/uboot/uboot.mk

@@ -54,7 +54,7 @@ endif
 
 ifeq ($(BR2_TARGET_UBOOT_FORMAT_ELF),y)
 UBOOT_BINS += u-boot
-# To make elf usable for debuging on ARC use special target
+# To make elf usable for debugging on ARC use special target
 ifeq ($(BR2_arc),y)
 UBOOT_MAKE_TARGET += mdbtrick
 endif