MAINTAINERS: update SCX200 file pattern

commit 3b3da9d25a ("x86: Move scx200 to platform") moved it, convert the
pattern too.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -5507,7 +5507,7 @@ SCx200 CPU SUPPORT
 M:	Jim Cromie <jim.cromie@gmail.com>
 S:	Odd Fixes
 F:	Documentation/i2c/busses/scx200_acb
-F:	arch/x86/kernel/scx200_32.c
+F:	arch/x86/platform/scx200/
 F:	drivers/watchdog/scx200_wdt.c
 F:	drivers/i2c/busses/scx200*
 F:	drivers/mtd/maps/scx200_docflash.c