drivers: ethernet: stm32n6: Use zephyr symbol for alignment attribute

Rather than symbol coming from the HAL, use zephyr `__aligned()` macro.

Signed-off-by: Erwan Gouriou <[email protected]>

Author: erwango

drivers/ethernet/eth_stm32_hal_common.c

@@ -46,8 +46,8 @@ uint8_t dma_rx_buffer[ETH_RXBUFNB][ETH_STM32_RX_BUF_SIZE] __eth_stm32_buf;
 uint8_t dma_tx_buffer[ETH_TXBUFNB][ETH_STM32_TX_BUF_SIZE] __eth_stm32_buf;
 
 #if DT_HAS_COMPAT_STATUS_OKAY(st_stm32n6_ethernet)
-ETH_DMADescTypeDef dma_rx_desc_tab[ETH_DMA_RX_CH_CNT][ETH_RXBUFNB] ALIGN_32BYTES(__eth_stm32_desc);
-ETH_DMADescTypeDef dma_tx_desc_tab[ETH_DMA_TX_CH_CNT][ETH_TXBUFNB] ALIGN_32BYTES(__eth_stm32_desc);
+ETH_DMADescTypeDef dma_rx_desc_tab[ETH_DMA_RX_CH_CNT][ETH_RXBUFNB] __eth_stm32_desc __aligned(32);
+ETH_DMADescTypeDef dma_tx_desc_tab[ETH_DMA_TX_CH_CNT][ETH_TXBUFNB] __eth_stm32_desc __aligned(32);
 #else
 ETH_DMADescTypeDef dma_rx_desc_tab[ETH_RXBUFNB] __eth_stm32_desc;
 ETH_DMADescTypeDef dma_tx_desc_tab[ETH_TXBUFNB] __eth_stm32_desc;