cmd: Make use of U_BOOT_LONGHELP when missing

After adding the U_BOOT_LONGHELP macro some new commands came in still
that were not making use if it. Switch these cases over and in a few
places add missing newlines as well.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-imx/cmd_mfgprot.c b/arch/arm/mach-imx/cmd_mfgprot.c
index 9925c99..9f37e61 100644
--- a/arch/arm/mach-imx/cmd_mfgprot.c
+++ b/arch/arm/mach-imx/cmd_mfgprot.c
@@ -134,12 +134,12 @@
 }
 
 /***************************************************/
-static char mfgprot_help_text[] =
+U_BOOT_LONGHELP(mfgprot,
 	"Usage:\n"
 	 "Print the public key for Manufacturing Protection\n"
 	 "\tmfgprot pubk\n"
 	 "Generates a Manufacturing Protection signature\n"
-	 "\tmfgprot sign <data_addr> <size>";
+	 "\tmfgprot sign <data_addr> <size>\n");
 
 U_BOOT_CMD(
 	mfgprot, 4, 1, do_mfgprot,