lib: Fix spelling

Change-Id: I999987af9cb44906e3c3135c0351a0cd6eb210ff
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/3756
Reviewed-by: Dave Frodin <dave.frodin@se-eng.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/lib/rmodule.c

@@ -232,7 +232,7 @@ int rmodule_load_alignment(const struct rmodule *module)
 	/* The load alignment is the start of the program's linked address.
 	 * The base address where the program is loaded needs to be a multiple
 	 * of the program's starting link address. That way all data alignment
-	 * in the program is presered. */
+	 * in the program is preserved. */
 	return module->header->module_link_start_address;
 }