[MTD] Remove gratuitous inclusion of ARM-only header from physmap.c

The physmap platform driver conversion added to physmap.c an include
of asm/mach/flash.h which is 1) ARM-specific; and 2) isn't actually
necessary.  Remove it.
Signed-off-by: NLennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

drivers/mtd/maps/physmap.c

@@ -22,7 +22,6 @@
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/physmap.h>
 #include <asm/io.h>
-#include <asm/mach/flash.h>
 
 struct physmap_flash_info {
 	struct mtd_info		*mtd;