Make carets line up in dtc diagnostics if the line starts with a tab.
Remove the {SRC,DOC,PORT}REVISION variables from release(7), and
update the default {SRC,DOC,PORT}BRANCH defaults.

Submitted by:	nwhitehorn
X-MFC-With:	r254224, r254294
X-MFC-To:	stable/9, releng/9.2
Added 4K quirks for:-
* OCZ Agility 2 SSDs
* Marvell SSDs
* Intel X25-M Series SSDs