MAINTAINERS: Update the file list in the TDX entry.

This includes files that were previously missed in the TDX entry file
list and makes it more future-proof. Most importantly, this now covers
the recently added KVM enabling.

[ dhansen: move from explicit files to "tdx" filename match ]

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/20250708101922.50560-2-kirill.shutemov%40linux.intel.com

Author: kiryl

MAINTAINERS

@@ -27329,13 +27329,8 @@ L:	x86@kernel.org
 L:	linux-coco@lists.linux.dev
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/tdx
-F:	Documentation/ABI/testing/sysfs-devices-virtual-misc-tdx_guest
-F:	arch/x86/boot/compressed/tdx*
-F:	arch/x86/coco/tdx/
-F:	arch/x86/include/asm/shared/tdx.h
-F:	arch/x86/include/asm/tdx.h
-F:	arch/x86/virt/vmx/tdx/
-F:	drivers/virt/coco/tdx-guest
+N:	tdx
+K:	\b(tdx)
 
 X86 VDSO
 M:	Andy Lutomirski <luto@kernel.org>