mvsas: increase port type detection delay to suit Seagate's 10k6 drive ST3450856SS...

commit ddccf307a3599e452804e228d8ed30fba578923e upstream.

I increased the delay step by step until loading of mvsas
reliably detected the drive 200 times in sequence. A much better
approach would be to monitor the hardware for some flag which
indicates that port detection has finished, but I do not have any
hardware documentation.

Signed-off-by: Reinhard Nissl <rnissl@gmx.de>
Cc: Ke Wei <kewei@marvell.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>