spl: Kconfig: Replace CONFIG_SPL_FAT_SUPPORT with CONFIG_SPL_FS_FAT

Replace CONFIG_SPL_FAT_SUPPORT with CONFIG_SPL_FS_FAT so
obj-$(CONFIG_$(SPL_)FS_FAT) can be used to control the build in both
SPL and U-Boot.

Signed-off-by: Tien Fong Chee <tien.fong.chee@intel.com>
Reviewed-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/common/spl/spl_mmc.c b/common/spl/spl_mmc.c
index 4d55dcc..e526167 100644
--- a/common/spl/spl_mmc.c
+++ b/common/spl/spl_mmc.c
@@ -238,7 +238,7 @@
 {
 	int err = -ENOSYS;
 
-#ifdef CONFIG_SPL_FAT_SUPPORT
+#ifdef CONFIG_SPL_FS_FAT
 	if (!spl_start_uboot()) {
 		err = spl_load_image_fat_os(spl_image, mmc_get_blk_desc(mmc),
 			CONFIG_SYS_MMCSD_FS_BOOT_PARTITION);
@@ -269,7 +269,7 @@
 #endif
 #endif
 
-#if defined(CONFIG_SPL_FAT_SUPPORT) || defined(CONFIG_SPL_EXT_SUPPORT)
+#if defined(CONFIG_SPL_FS_FAT) || defined(CONFIG_SPL_EXT_SUPPORT)
 	err = -ENOENT;
 #endif
 
@@ -284,7 +284,7 @@
 
 u32 __weak spl_boot_mode(const u32 boot_device)
 {
-#if defined(CONFIG_SPL_FAT_SUPPORT) || defined(CONFIG_SPL_EXT_SUPPORT)
+#if defined(CONFIG_SPL_FS_FAT) || defined(CONFIG_SPL_EXT_SUPPORT)
 	return MMCSD_MODE_FS;
 #elif defined(CONFIG_SUPPORT_EMMC_BOOT)
 	return MMCSD_MODE_EMMCBOOT;