cmd: env: fix a typo in a comment of do_env_set_efi()

A wrong function name is referred to in a comment of do_env_set_efi().

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/cmd/nvedit_efi.c b/cmd/nvedit_efi.c
index ed6d09a..ede4cd5 100644
--- a/cmd/nvedit_efi.c
+++ b/cmd/nvedit_efi.c
@@ -330,7 +330,7 @@
 }
 
 /**
- * do_env_print_efi() - set UEFI variable
+ * do_env_set_efi() - set UEFI variable
  *
  * @cmdtp:	Command table
  * @flag:	Command flag