Revert "spinlock"

This reverts commit fbb064def7e584caf60296b8eadf007f9c284f96.
because it causes this compile error:

/tmp/ccSkGqVZ.s: Assembler messages:
/tmp/ccSkGqVZ.s:15: Error: operand mismatch -- `add w3,w3,x1'
/tmp/ccSkGqVZ.s:508: Error: operand mismatch -- `add w4,w4,x1'
make[3]: *** [kernel/locking/spinlock.o] Error 1

Signed-off-by: Jon Medhurst <tixy@linaro.org>
1 file changed