Clean up our ARM assembly:

MFC 275256:

Switch to the ARM unified assembly language as the clang integrated as only
supports it. Binutils supports it when the ".syntax unified" directive
is set.

Sponsored by:   ABT Systems Ltd

MFC 275264:

Update _ENTRY to use _EENTRY to reduce the common code.

MFC 275321:

Remove extra labels, ENTRY_NP already provides them.

Sponsored by:   ABT Systems Ltd

MFC 275322:

Correctly a few incorrect uses of ENTRY/EENTRY and END/EEND

Sponsored by:   ABT Systems Ltd

MFC 275416:

Fix the name of the coprocessor to include the "p" prefix, the clang
integrated assembler expects this.

Sponsored by:   ABT Systems Ltd

MFC 275418:

Switch to unified syntax so these can be built with clang 3.5.

Sponsored by:   ABT Systems Ltd

MFC 275519:

Add missing END macros to some of the xscale functions.

Sponsored by:   ABT Systems Ltd

MFC 275520:

Use the unified syntax in a few more assembly files

Sponsored by:   ABT Systems Ltd

MFC 275521:

Set the alignment to 4-bytes after a string as clang 3.5 can switch to
thumb mode if this is incorrect.

Sponsored by:   ABT Systems Ltd

MFC 275522:

Place the literal pool after a RET otherwise clang 3.5 tries to put it too
far away from a ldr psuedo instruction. With this clang will place the
literal value here where it's close enough to be loaded.

Sponsored by:   ABT Systems Ltd

MFC 275523:

Switch to an armv6k cpu, without this clang 3.5 complains "bx lr" is
unsupported as it needs a newer cpu.

Sponsored by:   ABT Systems Ltd

MFC 275524:

Switch to a .cpu directive. These will work when clang 3.5 is imported
where the .arch directive is a nop.

Sponsored by:   ABT Systems Ltd