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/spl.c b/arch/arm/mach-zynqmp/spl.c
index d2a4d89..c3a9904 100644
--- a/arch/arm/mach-zynqmp/spl.c
+++ b/arch/arm/mach-zynqmp/spl.c
@@ -104,7 +104,7 @@
 	case SW_SATA_MODE:
 		return BOOT_DEVICE_SATA;
 #endif
-#ifdef CONFIG_SPL_SPI_SUPPORT
+#ifdef CONFIG_SPL_SPI
 	case QSPI_MODE_24BIT:
 	case QSPI_MODE_32BIT:
 		return BOOT_DEVICE_SPI;