spi: omap-uwire: Fix build error

Fixes the following build error introduced by commit b3f6a575
("spi: omap-uwire: use devm_ functions"):
drivers/spi/spi-omap-uwire.c:465:2: error: implicit declaration of function ‘devm_ioremap’

Since we are including <linux/io.h>, <asm/io.h> is no longer
needed. Remove it.
Signed-off-by: NSachin Kamat <sachin.kamat@samsung.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

drivers/spi/spi-omap-uwire.c

@@ -46,10 +46,10 @@
 #include <linux/spi/spi.h>
 #include <linux/spi/spi_bitbang.h>
 #include <linux/module.h>
+#include <linux/io.h>
 
 #include <asm/irq.h>
 #include <mach/hardware.h>
-#include <asm/io.h>
 #include <asm/mach-types.h>
 
 #include <mach/mux.h>