include/fat.h: Audit include list

This file does not need <asm/cache.h> so remove it. However the file
common/spl/spl_fat.c does need it, so add it there.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/common/spl/spl_fat.c b/common/spl/spl_fat.c
index f426a06..8b7cafa 100644
--- a/common/spl/spl_fat.c
+++ b/common/spl/spl_fat.c
@@ -16,6 +16,7 @@
 #include <errno.h>
 #include <image.h>
 #include <linux/libfdt.h>
+#include <asm/cache.h>
 
 static int fat_registered;
 
diff --git a/include/fat.h b/include/fat.h
index ca97880..bdf430f 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -11,7 +11,6 @@
 
 #include <fs.h>
 #include <asm/byteorder.h>
-#include <asm/cache.h>
 
 struct disk_partition;