clk: bcm2835: Limit PCM clock to OSC and PLLD_PER

It is unwise to use sources other than the oscillator and PLLD_PER for
the PCM peripheral (and perhaps others - TBD) because their rate can
change and they may even be switched off, so explicitly restrict the
choice using dummy entries in the list of potential parents (item index
is significant).

See: raspberrypi#1949

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

Merge remote-tracking branch 'stable/linux-4.4.y' into rpi-4.4.y

Merge remote-tracking branch 'stable/linux-4.4.y' into rpi-4.4.y

dwc_otg: fix summarize urb->actual_length for isochronous transfers

Kernel does not copy input data of ISO transfers to userspace
if actual_length is set only in ISO transfers and not summarized
in urb->actual_length. Fixes raspberrypi#903

Merge remote-tracking branch 'stable/linux-4.4.y' into rpi-4.4.y

Merge remote-tracking branch 'stable/linux-4.4.y' into rpi-4.4.y

Merge remote-tracking branch 'stable/linux-4.4.y' into rpi-4.4.y

Merge pull request raspberrypi#1524 from DigitalDreamtimeLtd/rpi-4.4.…

…y-dma

Pull upstream dma backport into rpi 4.4.y

config: Add NF_MATCH_RPFILTER

Revert "config: Add CONFIG_DRM_LOAD_EDID_FIRMWARE"

This reverts commit 417aed4.