x86: mce: Update X86_MCE description in x86/Kconfig

- Clarify that this config controls thermal throttling
reporting too
- Clarify the types of errors reported by machine checks
- Drop references to ancient CPUs.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

arch/x86/Kconfig

@@ -774,20 +774,12 @@ config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
 	  increased on these systems.
 
 config X86_MCE
-	bool "Machine Check Exception"
+	bool "Machine Check / overheating reporting"
 	---help---
-	  Machine Check Exception support allows the processor to notify the
-	  kernel if it detects a problem (e.g. overheating, component failure).
+	  Machine Check support allows the processor to notify the
+	  kernel if it detects a problem (e.g. overheating, data corruption).
 	  The action the kernel takes depends on the severity of the problem,
-	  ranging from a warning message on the console, to halting the machine.
-	  Your processor must be a Pentium or newer to support this - check the
-	  flags in /proc/cpuinfo for mce.  Note that some older Pentium systems
-	  have a design flaw which leads to false MCE events - hence MCE is
-	  disabled on all P5 processors, unless explicitly enabled with "mce"
-	  as a boot argument.  Similarly, if MCE is built in and creates a
-	  problem on some new non-standard machine, you can boot with "nomce"
-	  to disable it.  MCE support simply ignores non-MCE processors like
-	  the 386 and 486, so nearly everyone can say Y here.
+	  ranging from warning messages to halting the machine.
 
 config X86_OLD_MCE
 	depends on X86_32 && X86_MCE