x86/apic: Drop useless CXL/CPX row from the TSC deadline errata table

[Andrew Cooper]

A microcode revision of 0 is guaranteed to exit apic_validate_deadline_timer()
early, but a better way is with no row at all.

No functional change.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CC: Ingo Molnar <mingo@xxxxxxxxxx>
CC: Borislav Petkov <bp@xxxxxxxxx>
CC: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CC: x86@xxxxxxxxxx
CC: "H. Peter Anvin" <hpa@xxxxxxxxx>
CC: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CC: Sohil Mehta <sohil.mehta@xxxxxxxxx>
CC: Yuntao Wang <yuntao.wang@xxxxxxxxx>
CC: Zhang Rui <rui.zhang@xxxxxxxxx>
CC: linux-kernel@xxxxxxxxxxxxxxx

Strictly speaking, this is:

  Fixes: 66abf2388331 ("x86/apic: Convert the TSC deadline timer matching to steppings macro")

but I really don't think it's interesting to backport.

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index d73ba5a7b623..6ace71c52bee 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -522,7 +522,6 @@ static const struct x86_cpu_id deadline_match[] __initconst = {
 
 	X86_MATCH_VFM_STEPS(INTEL_SKYLAKE_X,   0x3, 0x3, 0x01000136),
 	X86_MATCH_VFM_STEPS(INTEL_SKYLAKE_X,   0x4, 0x4, 0x02000014),
-	X86_MATCH_VFM_STEPS(INTEL_SKYLAKE_X,   0x5, 0xf, 0),
 
 	X86_MATCH_VFM(INTEL_HASWELL,		0x22),
 	X86_MATCH_VFM(INTEL_HASWELL_L,		0x20),