arc: ICCM memory should have read-write-execute attributes

The ICCM memory, when present, can be both written and read,
so changing the attributes to be read-write-execute.

Change-Id: I432bd36f4a6ef632b7c4ce3bf8aa138895d52642
Signed-off-by: Chuck Jordan <cjordan@synopsys.com>
1 file changed