Make loadlist empty when booting Horizon, more nxboot.c code

Write all the needed pk1 code and a large part of the nxboot function

[stage2] Add debug printf in main.c

[stage2] Add dump_to_file

Rename sd_utils to fs_utils, etc

[stage2] Support sector sizes up to 4K in FatFs. ...

Note: SD cards always have a sector size of 512 bytes.

[stage2] Implement disk_status

Redesign fs_dev, raw_dev, introducing device_partition and switch_fs. ...

In theory, one could mount an encrypted FAT partition itself coming from a disk image, etc.

[stage2] Add console_get_framebuffer

[stage2] Accomodate raw_mmc_dev to latest sdmmc driver changes

stage1 -> stage2 again

We actually need the pk1 key

Merge pull request #93 from encounter/fix/stage2-args ...

Fix stage2_args_t mismatch

Fix misconception in latest commit

[stage2] Refactor key_derivation type and function declarations

Move sd init into diskio.c, write code for latest commit

Add code to register rawnand, boot0, and bcpkg2

raw_mmc_dev: fields should be u64

[stage2] Implement package1_parse_boot0

[stage2] Add bct.h

Apply sdmmc stage1 changes to stage2

[stage2] Add GPT parsing code (tested on PC)

[stage2] raw_mmc_dev.c: fix various bugs

[stage2] Make console.c manage the display, enable it only when needed

[stage2] Unstub rawmmcdev_write

[sdmmc] sdmmc_handle_cpu_transfer: handle unaligned buffers

Fix struct tegra_sdmmc definition ...

Definition errors were cancelling each other (for the most part)

[sdmmc] Fix const-correctness issue

Use latest sdmmc driver in stage2

Add raw_mmc_dev (untested!)