gst-plugins-base: Add YUV422 --> UYVY422 conversion

As discussed [1], this adds a direct colorspace conversion for
gstreamer's ffmpegcolorspace element.  This reduces the CPU load in
piping video from a webcam etc. to the TIVidenc1 encoder for the DSP
used in some OMAP3 chips.

All credit and thanks to Scott Ellis.  Taken from [2].

[1] http://www.jumpnowtek.com/gumstix/overo/Overo-ffmpegcolorspace-optimization.html
[2] https://github.com/jumpnow/meta-dsp-overo/tree/dora/recipes-multimedia/gstreamer

Signed-off-by: Ash Charles <ashcharles@gmail.com>
formfactor: Set formfactors for Overo, DuoVero and Pepper

Setup some default formfactor parameters for the machines in this
layer.
 * Overo + Tobi (has keyboard, no touchscreen)
 * DuoVero + Parlor (has keyboard, no touchscreen)
 * Pepper (no keyboard, has touchscreen)

These really only affect the matchbox environment but are included
to be complete and standard.

Signed-off-by: Ash Charles <ashcharles@gmail.com>
Use hardfloat tuning for Pepper.

Recent SGX binaries are provided in hardfloat mode only so we need
to be building in hardfloat mode to use these binaries.

Signed-off-by: Ash Charles <ashcharles@gmail.com>
Use hardfloat tuning for Overo.

Recent SGX binaries are provided in hardfloat mode only so we need
to be building in hardfloat mode to use these binaries.

Signed-off-by: Ash Charles <ashcharles@gmail.com>
duovero: Use hardfloat tuning

SGX binaries are provided in hardfloat mode only so we need to be
building in hardfloat mode to use these binaries.  Note that we use
"cortexa8hf-neon" rather than "cortexa9hf-neon" as the only difference
is -mtune=cortexa9 which, from these admittedly outdated, results [1],
doesn't have a substantial impact.  This allows all our platforms to
share the same tuning which substantially reduces build time and disk
space when building for Overo, Pepper, and DuoVero.

[1] https://wiki.linaro.org/MichaelHope/Sandbox/CoreMark1

Signed-off-by: Ash Charles <ashcharles@gmail.com>

Conflicts:
	conf/machine/duovero.conf
omap3-pwm: Specify include path for dmtimer.h

Signed-off-by: Ash Charles <ashcharles@gmail.com>