x86/irq: Fix outdated comments

INVALIDATE_TLB_VECTOR_START has been removed by:

  52aec330("x86/tlb: replace INVALIDATE_TLB_VECTOR by CALL_FUNCTION_VECTOR")

while VSYSCALL_EMU_VECTO(204) has also been removed, by:

  3ae36655("x86-64: Rework vsyscall emulation and add vsyscall= parameter")

so update the comments in <asm/irq_vectors.h> accordingly.

Signed-off-by: Jiang Biao <benbjiang@tencent.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bp@alien8.de
Link: http://lkml.kernel.org/r/20190422024943.71918-1-benbjiang@tencent.com


[ Improved the changelog. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>