src: Remove unneeded 'include <arch/cache.h>'

Change-Id: I6374bc2d397800d574c7a0cc44079c09394a0673
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37984
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/arch/arm/stages.c

@@ -14,7 +14,6 @@
 
 #include <cbmem.h>
 #include <arch/stages.h>
-#include <arch/cache.h>
 
 /**
  * generic stage entry point. override this if board specific code is needed.