nvramcui: Fix main function signature

LTO is not happy about signature mismatch.

Change-Id: Ia0c50224bd70503e884573fedf3bf33c134bba00
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84011
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

payloads/nvramcui/nvramcui.c

@@ -159,7 +159,7 @@ static void cmos_walk_options(struct cb_cmos_option_table *opttbl, FIELD **field
 	fields[2 * numopts] = NULL;
 }
 
-int main(void)
+int main(int argc, char **argv)
 {
 	int ch, done;
 	int i;