spi: Rename SPI_SUPPORT to SPI

Rename these options so that CONFIG_IS_ENABLED can be used with them.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/da850evm_defconfig b/configs/da850evm_defconfig
index b65a8e6..c1a857f 100644
--- a/configs/da850evm_defconfig
+++ b/configs/da850evm_defconfig
@@ -20,7 +20,7 @@
 CONFIG_SPL_SERIAL=y
 CONFIG_SPL=y
 CONFIG_SPL_SPI_FLASH_SUPPORT=y
-CONFIG_SPL_SPI_SUPPORT=y
+CONFIG_SPL_SPI=y
 CONFIG_LTO=y
 CONFIG_SYS_LOAD_ADDR=0xc0700000
 CONFIG_SYS_EXTRA_OPTIONS="MAC_ADDR_IN_SPIFLASH"