MAINTAINERS: Add x86 cpuid database entry

Add a specific entry for the x86 architecture cpuid database.

Reference the x86-cpuid.org development mailing list to facilitate easy
tracking by external stakeholders such as the Xen developers.

Include myself as a reviewer.

Note, this MAINTAINERS entry will also cover the auto-generated C cpuid
bitfields header files to be submitted in a future series.

Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20240718134755.378115-10-darwi@linutronix.de

Author: Ahmed S. Darwish

MAINTAINERS

@@ -24773,6 +24773,16 @@ F:	Documentation/arch/x86/
 F:	Documentation/devicetree/bindings/x86/
 F:	arch/x86/
 
+X86 CPUID DATABASE
+M:	Borislav Petkov <bp@alien8.de>
+M:	Thomas Gleixner <tglx@linutronix.de>
+M:	x86@kernel.org
+R:	Ahmed S. Darwish <darwi@linutronix.de>
+L:	x86-cpuid@lists.linux.dev
+S:	Maintained
+W:	https://x86-cpuid.org
+F:	tools/arch/x86/kcpuid/cpuid.csv
+
 X86 ENTRY CODE
 M:	Andy Lutomirski <luto@kernel.org>
 L:	linux-kernel@vger.kernel.org