src/drivers/spi: introduce AMIC support

Add support for the AMIC A25L032 flash chip.

Change-Id: Ie8d441a923c6fbd18c16440b4571321652d934d5
Signed-off-by: Idwer Vollering <vidwer@gmail.com>
Reviewed-on: http://review.coreboot.org/5252
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/drivers/spi/spi_flash.c

@@ -218,6 +218,9 @@ static struct {
 	struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode);
 } flashes[] = {
 	/* Keep it sorted by define name */
+#if CONFIG_SPI_FLASH_AMIC
+	{ 0, 0x37, spi_flash_probe_amic, },
+#endif
 #if CONFIG_SPI_FLASH_EON
 	{ 0, 0x1c, spi_flash_probe_eon, },
 #endif