Add optional vfb-defio-gc-wii patch

See here for more info: http://fartersoft.com/blog/2011/07/31/hacking-up-an-rgb-framebuffer-driver-for-wii-linux-take-two
Add GC-Wii-Linux-Kernel-3.0.y README.md
Prevent errors with PPC EARLY_DEBUG_USBGECKO

This is a temporary workaround until it gets fixed properly
Make Wii MMC_SDHCI_OF_HLWD dependent on STARLET_MINI
Update GCN SD for SDHC Cards

Originally from here: https://github.com/Nold360/GC-Linux-Kernel-2.6.32/commits/master