drivers: net: sam_gmac: add BUILD_ASSERT for checking GMAC_QUEUE_NUM

'GMAC_QUEUE_NUM' is a value of 'num-queues' for the first GMAC
instance getting from the device tree. It is used directly or
indirectly (by GMAC_PRIORITY_QUEUE_NUM) for defining and
initializing 'struct eth_sam_dev_data' with a value from Kconfig
(GMAC_ACTIVE_PRIORITY_QUEUE_NUM).

As there will be a big change for applying the corresponding
num-queues for each GMAC 'struct eth_sam_dev_data', here just
keep it as is. Adding the BUITD_ASSERT to make sure the array
queue_list[] is large enough for all GMAC instances.

Signed-off-by: Tony Han <[email protected]>

Author: TonyHan11

drivers/ethernet/eth_sam_gmac.c

@@ -2257,6 +2257,8 @@ static const struct ethernet_api eth_api = {
 #define DEFN_DATA_QUEUE_LIST_5(n)
 #endif
 #define SAM_GMAC_DATA_DEFN(n)								\
+		BUILD_ASSERT(GMAC_QUEUE_NUM >= DT_INST_PROP(n, num_queues),		\
+			     "The size of array queue_list[] is too small");		\
 		static struct eth_sam_dev_data eth##n##_data = {			\
 			.mac_addr = DT_INST_PROP_OR(n, local_mac_address, {0U}),	\
 			.queue_list = {							\