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/T2080QDS_SPIFLASH_defconfig b/configs/T2080QDS_SPIFLASH_defconfig
index 2c44de2..620dc0b 100644
--- a/configs/T2080QDS_SPIFLASH_defconfig
+++ b/configs/T2080QDS_SPIFLASH_defconfig
@@ -12,7 +12,7 @@
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_SPL=y
 CONFIG_SPL_SPI_FLASH_SUPPORT=y
-CONFIG_SPL_SPI_SUPPORT=y
+CONFIG_SPL_SPI=y
 CONFIG_MPC85xx=y
 CONFIG_TARGET_T2080QDS=y
 CONFIG_FIT=y