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/board/freescale/common/cmd_esbc_validate.c b/board/freescale/common/cmd_esbc_validate.c
index d4192e5..3344653 100644
--- a/board/freescale/common/cmd_esbc_validate.c
+++ b/board/freescale/common/cmd_esbc_validate.c
@@ -63,14 +63,14 @@
 }
 
 /***************************************************/
-static char esbc_validate_help_text[] =
+U_BOOT_LONGHELP(esbc_validate,
 	"esbc_validate hdr_addr <hash_val> - Validates signature using\n"
 	"                          RSA verification\n"
 	"                          $hdr_addr Address of header of the image\n"
 	"                          to be validated.\n"
 	"                          $hash_val -Optional\n"
 	"                          It provides Hash of public/srk key to be\n"
-	"                          used to verify signature.\n";
+	"                          used to verify signature.\n");
 
 U_BOOT_CMD(
 	esbc_validate,	3,	0,	do_esbc_validate,