input: omap: void using mach/*.h headers

The omap-keypad driver currently relies on including mach/memory.h
implicitly, but that won't happen once omap1 is converted to
CONFIG_ARCH_MULTIPLATFORM. Include the required header
explicitly.
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/input/keyboard/omap-keypad.c

@@ -24,6 +24,7 @@
 #include <linux/gpio.h>
 #include <linux/platform_data/gpio-omap.h>
 #include <linux/platform_data/keypad-omap.h>
+#include <linux/soc/ti/omap1-io.h>
 
 #undef NEW_BOARD_LEARNING_MODE