MAINTAINERS: Fix file pattern for X86 MCE INFRASTRUCTURE

Code restructuring renamed arch/x86/kernel/cpu/mcheck/ to
be arch/x86/kernel/cpu/mce/

Update the MAINTAINERS file pattern to account for this change.

Fixes: 21afaf1 ("x86/mce: Streamline MCE subsystem's naming")
Reported-by: Joe Perches <[email protected]>
Signed-off-by: Tony Luck <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: "H. Peter Anvin" <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Mauro Carvalho Chehab <[email protected]>
Cc: Nicolas Ferre <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: linux-edac <[email protected]>
Link: https://lkml.kernel.org/r/20190325233416.GB8869@agluck-desk

MAINTAINERS

@@ -16910,7 +16910,7 @@ M:	Tony Luck <[email protected]>
 M:	Borislav Petkov <[email protected]>
 L:	[email protected]
 S:	Maintained
-F:	arch/x86/kernel/cpu/mcheck/*
+F:	arch/x86/kernel/cpu/mce/*
 
 X86 MICROCODE UPDATE SUPPORT
 M:	Borislav Petkov <[email protected]>