modified:   kernel_loader/kernel_loader.c
    add h2c_()
    use asm_4g_memcpy() copy kernel to out of 1M address space.
modified:   kernel_loader/kloader_init.S
    add asm_4g_memcpy()
    add asm_read_sector: not yet complete
use LOAD_KERNEL_ADDR for kernel address
add LOAD_KERNEL_ADDR