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/board/compulab/cl-som-imx7/spl.c b/board/compulab/cl-som-imx7/spl.c
index 9c7332b..5d4c4d3 100644
--- a/board/compulab/cl-som-imx7/spl.c
+++ b/board/compulab/cl-som-imx7/spl.c
@@ -157,15 +157,15 @@
 	}
 }
 
-#ifdef CONFIG_SPL_SPI_SUPPORT
+#ifdef CONFIG_SPL_SPI
 
 static void cl_som_imx7_spl_spi_init(void)
 {
 	cl_som_imx7_espi1_pads_set();
 }
-#else /* !CONFIG_SPL_SPI_SUPPORT */
+#else /* !CONFIG_SPL_SPI */
 static void cl_som_imx7_spl_spi_init(void) {}
-#endif /* CONFIG_SPL_SPI_SUPPORT */
+#endif /* CONFIG_SPL_SPI */
 
 void board_init_f(ulong dummy)
 {