The #include <common.h> was added for mdelay(). Later, the declaration
of mdelay was moved to <linux/delay.h> by commit 5bc516ed66 ("delay:
collect {m, n, u}delay declarations to include/linux/delay.h").
There is no need to include <common.h> now.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>