Fix the following warning:

arch/arm/mach-imx/imx8/ahab.c:105:3: warning: implicit declaration of function 
‘flush_dcache_range’ [-Wimplicit-function-declaration]
   flush_dcache_range(s, e);
   ^~~~~~~~~~~~~~~~~~

Include cpu_func.h header which declares the flush_dcache_range()
function.

Signed-off-by: Oliver Graute <[email protected]>
Cc: Stefano Babic <[email protected]>
Cc: uboot-imx <[email protected]>
---
 arch/arm/mach-imx/imx8/ahab.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-imx/imx8/ahab.c b/arch/arm/mach-imx/imx8/ahab.c
index 5dbe1d56e0..abd648a60c 100644
--- a/arch/arm/mach-imx/imx8/ahab.c
+++ b/arch/arm/mach-imx/imx8/ahab.c
@@ -14,6 +14,7 @@
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/image.h>
 #include <console.h>
+#include <cpu_func.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
-- 
2.17.1

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