uboot-imx

sh: Fix path of irqflags.h

This changes path of irqflags.h from linux/ to asm/.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>