ARM: pxa: make more mach/*.h files local

Lots of header files are never included outside of a mach-pxa
directory and do not need to be made visible in include/mach,
so let's just move them all down one level.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-pxa/am300epd.c

@@ -28,8 +28,8 @@
 #include <linux/irq.h>
 #include <linux/gpio.h>
 
-#include <mach/gumstix.h>
-#include <mach/mfp-pxa25x.h>
+#include "gumstix.h"
+#include "mfp-pxa25x.h"
 #include <mach/irqs.h>
 #include <linux/platform_data/video-pxafb.h>