Document and report mpii(4) RAID 1E as such

Document and report mpii(4) RAID 1E as such

At least the built-in controller on sparc64 T4-2 machines supports 1E from
which OpenBSD boots just fine, but bioctl(8) reports it as RAID 10:

mpii0 at pci15 dev 0 function 0 "Symbios Logic SAS2008" rev 0x03: msi
mpii0: Solana On-Board, firmware 9.0.0.0 IR, MPI 2.0
scsibus1 at mpii0: 834 targets
sd0 at scsibus1 targ 0 lun 0: <LSI, Logical Volume, 3000> naa.600508e0000000006cd1dcd59022a30a
sd0: 713824MB, 512 bytes/sector, 1461911552 sectors
root on sd0a (efde5b2c6ab7b8ac.a) swap on sd0b dump on sd0b

	# bioctl mpii0
	Volume      Status               Size Device
	    mpii0 0 Online       748498714112 sd0     RAID10
		  0 Online       500107861504 0:2.0   noencl <ATA CT500MX500SSD1>
		  1 Online       500107861504 0:1.0   noencl <ATA CT500MX500SSD1>
		  2 Online       500107861504 0:0.0   noencl <ATA CT500MX500SSD1>

mpii(4) simply munged 1E into 10.
Report it as 0x1E just like softraid(4) RAID 1C is 0x1C internally:

	# ./obj/bioctl mpii0 | grep RAID
	    mpii0 0 Online       748498714112 sd0     RAID1E

OK jsing