Kernel: Add support for ATA CHS addressing and cleanup code

I thought that I had an PC without LBA support so I implement support
for CHS. Turns out that my ATA device detection was broken and was no
device on that port and initialize data was just garbage.

Now that I added CHS, I guess I should just keep it in :)

Both ATA read and write are now combined into a single function to avoid
code duplication.

kernel/kernel/Errors.cpp

@@ -17,7 +17,6 @@ namespace Kernel
 		"Ext2 filesystem out of inodes",
 		"Attempted to access outside of device boundaries",
 		"Device has invalid GPT header",
-		"Device does not support LBA addressing",
 		"Address mark not found",
 		"Track zero not found",
 		"Aborted command",