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/socfpga_secu1_defconfig b/configs/socfpga_secu1_defconfig
index 12b7709..963215d 100644
--- a/configs/socfpga_secu1_defconfig
+++ b/configs/socfpga_secu1_defconfig
@@ -12,7 +12,7 @@
 CONFIG_TARGET_SOCFPGA_ARRIA5_SECU1=y
 CONFIG_ENV_OFFSET_REDUND=0x120000
 # CONFIG_SPL_LIBDISK_SUPPORT is not set
-# CONFIG_SPL_SPI_SUPPORT is not set
+# CONFIG_SPL_SPI is not set
 CONFIG_BUILD_TARGET="u-boot-with-nand-spl.sfp"
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_SYS_LOAD_ADDR=0x02000000