This patch adds dual flash firmware support for Series 7 and above controllers.

[thenzl: used ssleep(10) instead udelay]
Signed-off-by: NMahesh Rajashekhara <Mahesh.Rajashekhara@pmcs.com>
Reviewed-by: NTomas Henzl <thenzl@redhat.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>