powerpc/fsl_booke/32: Fix build with CONFIG_RANDOMIZE_BASE

Building the current 5.8 kernel for an e500 machine with
CONFIG_RANDOMIZE_BASE=y and CONFIG_BLOCK=n yields the following
failure:

  arch/powerpc/mm/nohash/kaslr_booke.c: In function 'kaslr_early_init':
  arch/powerpc/mm/nohash/kaslr_booke.c:387:2: error: implicit
  declaration of function 'flush_icache_range'; did you mean 'flush_tlb_range'?

Indeed, including asm/cacheflush.h into kaslr_booke.c fixes the build.

Fixes: 2b0e86c ("powerpc/fsl_booke/32: implement KASLR infrastructure")
Cc: [email protected] # v5.5+
Signed-off-by: Arseny Solokha <[email protected]>
Reviewed-by: Jason Yan <[email protected]>
Acked-by: Scott Wood <[email protected]>
[mpe: Tweak change log to mention CONFIG_BLOCK=n]
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Arseny Solokha

arch/powerpc/mm/nohash/kaslr_booke.c

@@ -14,6 +14,7 @@
 #include <linux/memblock.h>
 #include <linux/libfdt.h>
 #include <linux/crash_core.h>
+#include <asm/cacheflush.h>
 #include <asm/pgalloc.h>
 #include <asm/prom.h>
 #include <asm/kdump.h>