core: arm64: bugfix invalidate touched init memory

The entire range of memory touched during init need to be invalidated in
the caches before enabling the caches.

Prior to this patch with CFG_WITH_PAGER=y the caches where only
invalidated until __init_end which isn't enough, memory up to
__tmp_hashes_end is actually touched. With this patch the range is
increased to __tmp_hashes_end which is the same as is used in the arm32
code.

Tested-by: Jerome Forissier <jerome.forissier@linaro.org> (HiKey 32/64)
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Tested-by: Jens Wiklander <jens.wiklander@linaro.org> (Hikey 64-bit pager)
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>

core/arch/arm/kernel/generic_entry_a64.S

@@ -130,8 +130,8 @@ clear_bss:
 
 	adr	x0, __text_start
 #ifdef CFG_WITH_PAGER
-	adrp	x1, __init_end
-	add	x1, x1, :lo12:__init_end
+	adrp	x1, __tmp_hashes_end
+	add	x1, x1, :lo12:__tmp_hashes_end
 #else
 	adrp	x1, __end
 	add	x1, x1, :lo12:__end
@@ -161,8 +161,8 @@ clear_bss:
 	mov	x19, x0
 	adr	x0, __text_start
 #ifdef CFG_WITH_PAGER
-	adrp	x1, __init_end
-	add	x1, x1, :lo12:__init_end
+	adrp	x1, __tmp_hashes_end
+	add	x1, x1, :lo12:__tmp_hashes_end
 #else
 	adrp	x1, __end
 	add	x1, x1, :lo12:__end