Mention tmpfs(5)

PR:		192389
Submitted by:	yaneurabeya@gmail.com
Approved by:	hrs (mentor)
Reduce reported additional INQUIRY data length.

sizeof(struct scsi_inquiry_data) of 256 bytes combined with off-by-one
error in the changed code gave total INQUIRY data length above 255 bytes,
that was maximal INQUIRY length in SPC-2.  While SPC-3 increased the
maximal length to 64K, at least sg3_utils are still confused by that.

MFC after:	1 week
drm: fix usage of vm_phys_fictitious_to_vm_page

vm_phys_fictitious_to_vm_page should not be called directly, even when
operating on a range that has been registered using
vm_phys_fictitious_reg_range. PHYS_TO_VM_PAGE should be used instead
because on arches that use VM_PHYSSEG_DENSE the page might come
directly from vm_page_array.

Reported by: nwhitehorn
Tested by: nwhitehorn, David Mackay <davidm.jx8p@gmail.com>
Sponsored by: Citrix Systems R&D
Set fb_pbase properly on PowerPC in the case where we have to guess at
the right register bank for the framebuffer. Disable the assigned-addresses
path on SPARC since it is just a hack for IBM PPC systems and was neither
relevant for nor worked on SPARC anyway.