Use __force in IO_ADDRESS macro to silence sparse

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/plat-mxc/include/mach/mx3x.h

@@ -157,7 +157,7 @@
  * it returns 0xDEADBEEF
  */
 #define IO_ADDRESS(x)   \
-	(void __iomem *) \
+	(void __force __iomem *) \
 	(((x >= AIPS1_BASE_ADDR) && (x < (AIPS1_BASE_ADDR + AIPS1_SIZE))) ? AIPS1_IO_ADDRESS(x):\
 	((x >= SPBA0_BASE_ADDR) && (x < (SPBA0_BASE_ADDR + SPBA0_SIZE))) ? SPBA0_IO_ADDRESS(x):\
 	((x >= AIPS2_BASE_ADDR) && (x < (AIPS2_BASE_ADDR + AIPS2_SIZE))) ? AIPS2_IO_ADDRESS(x):\