Change 'repeatable' attribute of some commands to sensible values.

Most prominently this changes 'erase' to be non-repeatable.

Signed-off-by: Detlev Zundel <dzu@denx.de>
diff --git a/common/cmd_flash.c b/common/cmd_flash.c
index cb1c5bb..a34ab79 100644
--- a/common/cmd_flash.c
+++ b/common/cmd_flash.c
@@ -690,7 +690,7 @@
 );
 
 U_BOOT_CMD(
-	erase,   3,   1,  do_flerase,
+	erase,   3,   0,  do_flerase,
 	"erase   - erase FLASH memory\n",
 	"start end\n"
 	"    - erase FLASH from addr 'start' to addr 'end'\n"
@@ -704,7 +704,7 @@
 );
 
 U_BOOT_CMD(
-	protect,  4,  1,   do_protect,
+	protect,  4,  0,   do_protect,
 	"protect - enable or disable FLASH write protection\n",
 	"on  start end\n"
 	"    - protect FLASH from addr 'start' to addr 'end'\n"