cosmetic: Fix spelling and whitespace errors

Signed-off-by: Thomas Hebb <tommyhebb@gmail.com>
diff --git a/Makefile b/Makefile
index 70347d3..556cebd 100644
--- a/Makefile
+++ b/Makefile
@@ -1692,7 +1692,7 @@
 # make sure no implicit rule kicks in
 $(sort $(u-boot-init) $(u-boot-main)): $(u-boot-dirs) ;
 
-# Handle descending into subdirectories listed in $(vmlinux-dirs)
+# Handle descending into subdirectories listed in $(u-boot-dirs)
 # Preset locale variables to speed up the build process. Limit locale
 # tweaks to this spot to avoid wrong language settings when running
 # make menuconfig etc.