x86/percpu: Unify __pcpu_op{1,2}_N() macros to __pcpu_op_N()

Unify __pcpu_op1_N() and __pcpu_op2_N() macros to __pcpu_op_N()
by applying the macro only to asm mnemonic, not to the mnemonic
plus its arguments.

No functional change intended.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250224071648.15913-1-ubizjak@gmail.com