Fix assembly code for clang

.func and .endfunc are obsolete and have no effect on modern gcc either.
vuzpq and strcsh are nonstandard extensions that are equivalent to the
standard vuzp/strhcs instructions.

Both variants are understood by gas, clang's integrated-as understands
only the standard options.

Change-Id: Icfbfa8a30df18b04ef55442a898b582e90a45ed4
Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>
Merge "Fix assembly code for clang"