Size reduction patches

[Sascha Hauer]

The following patches aim to make a smaller barebox possible. They
make several things like command handling, having a shell or having
a fullblown malloc support configurable.

Sascha Hauer (12):
      add block support
      ata: use block support
      ata: make write support optional
      mci: make write support optional
      env: Make environment variable support optional
      make command support optional
      add noshell support
      arm: compile icache command only when command support is present
      malloc: put common memory functions to seperate file
      add dummy_malloc functions
      ARM: make exception handling optional
      nand: make reading oob optional

 arch/arm/Kconfig              |    5 +
 arch/arm/cpu/Makefile         |    4 +-
 arch/arm/cpu/cpu.c            |    3 +-
 arch/arm/cpu/start.c          |   10 ++
 commands/Kconfig              |   13 ++-
 common/Kconfig                |   42 +++++++-
 common/Makefile               |    9 +-
 common/block.c                |  263 +++++++++++++++++++++++++++++++++++++++++
 common/dlmalloc.c             |   50 --------
 common/dummy_malloc.c         |   26 ++++
 common/memory.c               |   71 +++++++++++
 common/startup.c              |    5 +-
 drivers/ata/Kconfig           |    5 +
 drivers/ata/disk_drive.c      |  196 ++++++------------------------
 drivers/mci/Kconfig           |    5 +
 drivers/mci/mci-core.c        |    6 +
 drivers/mtd/nand/Kconfig      |    5 +
 drivers/mtd/nand/nand.c       |   42 ++++++--
 drivers/mtd/nand/nand_base.c  |    9 ++-
 drivers/mtd/nand/nand_hwecc.c |    2 +
 fs/Makefile                   |    2 +-
 include/block.h               |   32 +++++
 include/environment.h         |   12 ++
 include/malloc.h              |    1 +
 24 files changed, 591 insertions(+), 227 deletions(-)
 create mode 100644 common/block.c
 create mode 100644 common/dummy_malloc.c
 create mode 100644 common/memory.c
 create mode 100644 include/block.h