scsi: hpsa: Get rid of compat_alloc_user_space()

scsi: hpsa: Get rid of compat_alloc_user_space()

No need for building a native struct on kernel stack, copying it to
userland one, then calling hpsa_ioctl() which copies it back into _another_
instance of the same struct.

Link: https://lore.kernel.org/r/20200529234028.46373-3-viro@ZenIV.linux.org.uk
Acked-by: Don Brace <don.brace@microsemi.com>
Tested-by: Don Brace <don.brace@microsemi.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>