Staging: HTC Dream: add camera support

This patch adds driver for HTC Dream camera. I guess driver is
slightly higher quality than usual for staging/ , but it is fairly big
and I don't feel like doing all the cleanups myself. Also some parts
can probably be removed, as they did not end up in shipping hardware..

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Cc: Brian Swetland <swetland@google.com>
Cc: Iliyan Malchev <ibm@android.com>
Cc: San Mehat <san@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>