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/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 34e1f95..73327aa 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -282,7 +282,7 @@
 	imply SPL_DM_SPI
 	imply SPL_SPI_FLASH_SUPPORT
 	imply SPL_SPI_LOAD
-	imply SPL_SPI_SUPPORT
+	imply SPL_SPI
 	select SPL_BOOTROM_SUPPORT
 
 config MVEBU_SPL_BOOT_DEVICE_MMC