include/commonlib/bsd/mem_chip_info.h: Use C99 flexible arrays

Use C99 flexible arrays instead of older style of one-element or
zero-length arrays.
It allows the compiler to generate errors when the flexible array does
not occur at the end in the structure.

Change-Id: Ia1d597c0e3e86db8c13829e58a8a27d9de1480b4
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76788
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/commonlib/bsd/include/commonlib/bsd/mem_chip_info.h

@@ -86,7 +86,7 @@ struct mem_chip_info {
 		uint8_t manufacturer_id; /* raw value from MR5 */
 		uint8_t revision_id[2];	/* raw values from MR6 and MR7 */
 		uint8_t serial_id[8];	/* LPDDR5 only (set to 0 otherwise), MR47 - MR54 */
-	} entries[0];
+	} entries[];
 };
 
 static inline size_t mem_chip_info_size(int entries)