misc: Mark MICROCODE_MINOR unused

This one is unused since

  181b6f4 ("x86/microcode: Rip out the OLD_INTERFACE")

so comment it out.

Link: https://lore.kernel.org/r/20220525161232.14924-1-bp@alien8.de
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220727114948.30123-1-bp@alien8.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: suryasaimadhu

include/linux/miscdevice.h

@@ -44,7 +44,7 @@
 #define AGPGART_MINOR		175
 #define TOSH_MINOR_DEV		181
 #define HWRNG_MINOR		183
-#define MICROCODE_MINOR		184
+/*#define MICROCODE_MINOR	184	unused */
 #define KEYPAD_MINOR		185
 #define IRNET_MINOR		187
 #define D7S_MINOR		193