MAINTAINERS: remove non existent files

Inspired by some recent cleanups in MAINTAINERS the following files (F:)
cannot be found any more in the tree:

* arch/arm/mach-s5pv210/mach-aquila.c
* arch/arm/mach-s5pv210/mach-goni.c

  Those two got removed in commit 28c8331d ("ARM: S5PV210: Remove
  support for board files").

  Cc: Tomasz Figa <t.figa@samsung.com>
  Cc: Kyungmin Park <kyungmin.park@samsung.com>

* drivers/rtc/rtc-sec.c

  A MAINTAINERS fix was attempted in November 2012, but dismissed as
  rtc-sec.c was still being worked on.  Alas, it's still not there.

  "MAINTAINERS: fix drivers/rtc/rtc-sec.c"
  http://lkml.iu.edu/hypermail/linux/kernel/1211.2/04820.html
  Cc: Sangbeom Kim <sbkim73@samsung.com>
  Cc: Cesar Eduardo Barros <cesarb@cesarb.eti.br>
Signed-off-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -1338,8 +1338,7 @@ ARM/SAMSUNG MOBILE MACHINE SUPPORT
 M:	Kyungmin Park <kyungmin.park@samsung.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
-F:	arch/arm/mach-s5pv210/mach-aquila.c
-F:	arch/arm/mach-s5pv210/mach-goni.c
+F:	arch/arm/mach-s5pv210/
 
 ARM/SAMSUNG S5P SERIES 2D GRAPHICS ACCELERATION (G2D) SUPPORT
 M:	Kyungmin Park <kyungmin.park@samsung.com>
@@ -7975,7 +7974,6 @@ S:	Supported
 F:	drivers/mfd/sec*.c
 F:	drivers/regulator/s2m*.c
 F:	drivers/regulator/s5m*.c
-F:	drivers/rtc/rtc-sec.c
 F:	include/linux/mfd/samsung/
 
 SAMSUNG S5P/EXYNOS4 SOC SERIES CAMERA SUBSYSTEM DRIVERS