[ARM] Include asm/hardware.h not asm/arch/hardware.h

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pnx4008/serial.c b/arch/arm/mach-pnx4008/serial.c
index 2e1e04c..1032238 100644
--- a/arch/arm/mach-pnx4008/serial.c
+++ b/arch/arm/mach-pnx4008/serial.c
@@ -16,7 +16,7 @@
 #include <asm/io.h>
 
 #include <asm/arch/platform.h>
-#include <asm/arch/hardware.h>
+#include <asm/hardware.h>
 
 #include <linux/serial_core.h>
 #include <linux/serial_reg.h>