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/arch/x86/cpu/apollolake/Kconfig b/arch/x86/cpu/apollolake/Kconfig
index b710a65..c7f26d1 100644
--- a/arch/x86/cpu/apollolake/Kconfig
+++ b/arch/x86/cpu/apollolake/Kconfig
@@ -88,7 +88,7 @@
 config APL_SPI_FLASH_BOOT
 	bool "Support booting with SPI-flash driver instead memory-mapped SPI"
 	select TPL_SPI_FLASH_SUPPORT
-	select TPL_SPI_SUPPORT
+	select TPL_SPI
 	select TPL_DM_SPI
 	select TPL_DM_SPI_FLASH
 	help