util/cbfstool: Fix typos

Change-Id: I6967a106ce1286d633ddeeb041f582e65f9ea78c
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/28208
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>

util/cbfstool/rmodule.h

@@ -36,7 +36,7 @@ struct rmod_context {
 	/* endian conversion ops */
 	struct xdr *xdr;
 
-	/* Parsed ELF sturcture. */
+	/* Parsed ELF structure. */
 	struct parsed_elf pelf;
 	/* Program segment. */
 	Elf64_Phdr *phdr;