miscellaneous: Add include/linux/version.h and cleanup some whitespace.

This commit adds version.h to Git as the dwc_otg driver is now modified
to handle the kernel version and people cloning my repository would need
this file to successfully build.
Add retry for vchiq init. Needed in some cases when using CMA
Silence bootup errors from timer and gpio
Remove RTC_HCTOSYS as it produces a kernel boot error, and doesn't do anything with RTC kernel modules
Make CMA kernel messages quieter when not fatal
Add missing USB_NET modules