spi: Add support for R40

The R40 is closely related to the A20, but has in fact a newer
generation SPI controller.
Add the R40 SoC ID to the right places to enable SPI support.

Tested on a Bananapi M2 Berry with SPI flash attached to header pins.
Signed-off-by: Andre Przywara <osp@andrep.de>

fel-spiflash.c

@@ -136,6 +136,7 @@ static uint32_t spi_base(feldev_handle *dev)
 	case 0x1623: /* A10 */
 	case 0x1625: /* A13 */
 	case 0x1651: /* A20 */
+	case 0x1701: /* R40 */
 		return 0x01C05000;
 	case 0x1817: /* V831 */
 		return 0x05010000;
@@ -209,6 +210,7 @@ static bool spi0_init(feldev_handle *dev)
 		break;
 	case 0x1623: /* Allwinner A10 */
 	case 0x1651: /* Allwinner A20 */
+	case 0x1701: /* Allwinner R40 */
 		gpio_set_cfgpin(dev, PC, 0, SUNXI_GPC_SPI0);
 		gpio_set_cfgpin(dev, PC, 1, SUNXI_GPC_SPI0);
 		gpio_set_cfgpin(dev, PC, 2, SUNXI_GPC_SPI0);