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-zynqmp/Kconfig b/arch/arm/mach-zynqmp/Kconfig
index 7805326..f7b08db 100644
--- a/arch/arm/mach-zynqmp/Kconfig
+++ b/arch/arm/mach-zynqmp/Kconfig
@@ -21,7 +21,7 @@
 config SPL_SPI_FLASH_SUPPORT
 	default y if ZYNQ_QSPI
 
-config SPL_SPI_SUPPORT
+config SPL_SPI
 	default y if ZYNQ_QSPI
 
 config SYS_BOARD