configs: at91: Remove CONFIG_SYS_EXTRA_OPTIONS assignment

To remove the assignment of CONFIG_SYS_EXTRA_OPTIONS option,
which is deprecated, use the CONFIG_XXXX_BOOT options to
indicate the boot media, and the SoC is selected by the board.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
diff --git a/include/configs/vinco.h b/include/configs/vinco.h
index 0bd8bbb..aaed815 100644
--- a/include/configs/vinco.h
+++ b/include/configs/vinco.h
@@ -78,7 +78,7 @@
 #define CONFIG_NET_RETRY_COUNT		20
 #define CONFIG_MACB_SEARCH_PHY
 
-#ifdef CONFIG_SYS_USE_SERIALFLASH
+#ifdef CONFIG_SPI_BOOT
 /* bootstrap + u-boot + env + linux in serial flash */
 #define CONFIG_ENV_SPI_BUS	CONFIG_SF_DEFAULT_BUS
 #define CONFIG_ENV_SPI_CS	CONFIG_SF_DEFAULT_CS