include/memrange.h: Remove repeated word

Change-Id: Id010c72bbbb302f1756a53a228fa0bdd7ec7654b
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49522
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jacob Garber <jgarber1@ualberta.ca>

src/include/memrange.h

@@ -52,7 +52,7 @@ static inline resource_t range_entry_end(const struct range_entry *r)
 	return r->end + 1;
 }
 
-/* Return size of of memory range. */
+/* Return size of memory range. */
 static inline resource_t range_entry_size(const struct range_entry *r)
 {
 	return r->end - r->begin + 1;