ARM: mmp: make plat-pxa build standalone

The ssp.c driver in plat-pxa is the only remaining file including a
mach/*.h header from mmp. It actually doesn't need mach/hardware.h at
all, so we can remove the #include.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/plat-pxa/ssp.c

@@ -34,7 +34,6 @@
 #include <linux/of_device.h>
 
 #include <asm/irq.h>
-#include <mach/hardware.h>
 
 static DEFINE_MUTEX(ssp_lock);
 static LIST_HEAD(ssp_list);