Convert CONFIG_SCSI to Kconfig

This converts the following to Kconfig:
   CONFIG_SCSI

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig
index 6ae54ef..89476a6 100644
--- a/arch/arm/mach-mvebu/Kconfig
+++ b/arch/arm/mach-mvebu/Kconfig
@@ -77,6 +77,7 @@
 config TARGET_MVEBU_ARMADA_37XX
 	bool "Support Armada 37xx platforms"
 	select ARMADA_3700
+	imply SCSI
 
 config TARGET_DB_88F6720
 	bool "Support DB-88F6720 Armada 375"
@@ -94,6 +95,7 @@
 	bool "Support Armada 7k/8k platforms"
 	select ARMADA_8K
 	select BOARD_LATE_INIT
+	imply SCSI
 
 config TARGET_DB_MV784MP_GP
 	bool "Support db-mv784mp-gp"