calloc is not exported by default. This patch
exposes the same.

Signed-off-by: Nishanth Menon <x0nishan@ti.com>

more cleanups, fix compiler warnings

restructure tree, add reginfo command

remove malloc_bin_reloc()

Comment out malloc_trim(). This functions gives back memory to the
system via negative calls to sbrk(). This is completely useless in
U-Boot since noone else could make use of this memory.

- do more POSIX:
  - use DIR instead of struct dirent
  - use (struct dirent)->d_name instead of (struct dirent)->name
- switch to a new layout for U_BOOT_CMD:
  - use C99 initializers to be able to add more fields to the
    command struct
  - add aliases for commands (needed mainly for help -> ? and test -> [
  - This is not done for all commands yet, but the compiler will tell you ;)

add mallocinfo command

remove unneeded ifdef for arm, remove global data

remove global data gd_t and board info bd_t entirely for arm

unifdef HAVE_MMAP

remove all #if 0 and #if 1

- remove trailing white space, trailing empty lines, C++ comments, etc.
  - split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c)

* Patches by Kenneth Johansson, 25 Jun 2003:
  - major rework of command structure
    (work done mostly by Michal Cendrowski and Joakim Kristiansen)