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

fusee: allow sdmmc_read / sdmmc_write of more data than fits in the bounce buffer

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

fusee: actually obey the SD spec when switching voltage

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

fusee: support low-voltage SDMMC mode

fusee: use full bus width and faster initial clock speed

[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!)

Rename g_devices to g_fsdev_devices

Rewrite condition in fsdev_seek

Refine error in fsdev_mount_device

Make stdout line-buffered

Fix FindDevice and RemoveDevice calls in fs_dev.c

O_RDONLY is 0

Rewrite package2.c

Change the allocation logic in stratosphere.c

Refactor stage1's and stage2's main.c files

Don't deinit the display yet, for now

Fix bug in crt0