arm: Disable unaligned access traps
arm: Disable unaligned access traps

GCC enables unaligned memory access for ARMv6 and above.
Once unaligned memory access is allowed, there's no need
for the unaligned memory access trap.

The change prevents the situation when the compiler
generates code that uses unaligned memory access, but
the CPU generates an exception when this code runs.

Change-Id: Id33f2264c631772e5c561e76fb579d8b7bc26e1e
Signed-off-by: Dmitriy Korovkin <236c6d6726c42916ff3b3577f1e4a2ded1fbf8fe@windriver.com>

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