util/cbfstool/amdcompress: fix argument requirement

The compress and uncompress options don't have arguments and shouldn't
consume the next token. So replace required_argument with no_argument
for the two options.

Change-Id: Ib9b190f2cf606109f82a65d00327871d6ffb7082
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47573
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

util/cbfstool/amdcompress.c

@@ -29,9 +29,9 @@ static const char *optstring  = "i:o:cm:uh";
 static struct option long_options[] = {
 	{"infile",           required_argument, 0, 'i' },
 	{"outfile",          required_argument, 0, 'o' },
-	{"compress",         required_argument, 0, 'c' },
+	{"compress",         no_argument,       0, 'c' },
 	{"maxsize",          required_argument, 0, 'm' },
-	{"uncompress",       required_argument, 0, 'u' },
+	{"uncompress",       no_argument,       0, 'u' },
 	{"help",             no_argument,       0, 'h' },
 };