[ARM] pxa: remove unnecessary #include of pxa-regs.h and hardware.h

pxa-regs.h and hardware.h are not intended for use directly in driver
code, remove those unnecessary references.

Signed-off-by: Eric Miao <eric.miao@marvell.com>

sound/soc/pxa/tosa.c

@@ -30,8 +30,6 @@
 
 #include <asm/mach-types.h>
 #include <mach/tosa.h>
-#include <mach/pxa-regs.h>
-#include <mach/hardware.h>
 #include <mach/audio.h>
 
 #include "../codecs/wm9712.h"