ARM: pxa: fix building issue of missing physmap.h

Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 0bc9387..b49a2c2 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -25,6 +25,7 @@
 #include <linux/spi/corgi_lcd.h>
 #include <linux/spi/pxa2xx_spi.h>
 #include <linux/mtd/sharpsl.h>
+#include <linux/mtd/physmap.h>
 #include <linux/input/matrix_keypad.h>
 #include <linux/regulator/machine.h>
 #include <linux/io.h>