pvr: Add PVR back to the kernel (DDK 1.9@2291151)

Note: gpsIONClient was renamed to gpsIONClientPVR due to a conflict with omaplfb.

TODO: Kconfig and Makefile clean-up.
omap: Fix warning when OMAP errata options are disabled.
sgxfreq: add sysfs interface to store frequency limit
sgx: add thermal framework support.
This patch adds sgxfreq_cool.c which allows GPU to work with OMAP Thermal Framework, for a better throttling and temperature support.
This is a part of DDK 1.9@2291151
Signed-off-by: Gianmarco Rengucci <rengucci.gianmarco@gmail.com>
REPO: Update .gitignore