ARM: mx3: rename mach-mx35pdk.c to mach-mx35_3ds.c matching its arch number

Additional document all known names of that machine.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

arch/arm/mach-mx3/Makefile

@@ -22,5 +22,5 @@ obj-$(CONFIG_MACH_MX31MOBOARD)	+= mach-mx31moboard.o mx31moboard-devboard.o \
 obj-$(CONFIG_MACH_QONG)		+= mach-qong.o
 obj-$(CONFIG_MACH_PCM043)	+= mach-pcm043.o
 obj-$(CONFIG_MACH_ARMADILLO5X0) += mach-armadillo5x0.o
-obj-$(CONFIG_MACH_MX35_3DS)	+= mach-mx35pdk.o
+obj-$(CONFIG_MACH_MX35_3DS)	+= mach-mx35_3ds.o
 obj-$(CONFIG_MACH_KZM_ARM11_01)	+= mach-kzm_arm11_01.o

arch/arm/mach-mx3/mach-mx35pdk.c → arch/arm/mach-mx3/mach-mx35_3ds.c

@@ -18,6 +18,12 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+/*
+ * This machine is known as:
+ *  - i.MX35 3-Stack Development System
+ *  - i.MX35 Platform Development Kit (i.MX35 PDK)
+ */
+
 #include <linux/types.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>