MAINTAINERS: update file entries after arm multi-platform rework and mach-pxa removal

In the work of Arnd's arm multi-platform support, various files in arch/arm
are moved and after the arm mach-pxa removal, only a few files remain to be
not aligned with entries in MAINTAINERS.

These file movements still require adjustments in MAINTAINERS:

  Files in arch/arm/mach-ep93xx/include/mach/ are made local:

    arch/arm/{mach-ep93xx/include/mach/uncompress.h => boot/compressed/misc-ep93xx.h}
    arch/arm/mach-ep93xx/{include/mach => }/ep93xx-regs.h
    arch/arm/mach-ep93xx/{include/mach => }/mach/irqs.h

  Files in arch/arm/mach-vexpress/ are moved to mach-versatile.

Correct the remaining references accordingly after these refactorings.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

MAINTAINERS

@@ -2071,8 +2071,8 @@ M:	Hartley Sweeten <hsweeten@visionengravers.com>
 M:	Alexander Sverdlin <alexander.sverdlin@gmail.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
+F:	arch/arm/boot/compressed/misc-ep93xx.h
 F:	arch/arm/mach-ep93xx/
-F:	arch/arm/mach-ep93xx/include/mach/
 
 ARM/CLKDEV SUPPORT
 M:	Russell King <linux@armlinux.org.uk>
@@ -2975,7 +2975,7 @@ S:	Maintained
 F:	*/*/*/vexpress*
 F:	*/*/vexpress*
 F:	arch/arm/boot/dts/vexpress*
-F:	arch/arm/mach-vexpress/
+F:	arch/arm/mach-versatile/
 F:	arch/arm64/boot/dts/arm/
 F:	drivers/clk/versatile/clk-vexpress-osc.c
 F:	drivers/clocksource/timer-versatile.c