Renames supported platform configurations

Renames supported platform configurations to conform to new platform
configuration naming scheme.

Example usage with PLATFORM_CONFIG:
    make PLATFORM_CONFIG=basic_cortex_m3
    make PLATFORM_CONFIG=basic_atom
    make PLATFORM_CONFIG=basic_minuteia
    make PLATFORM_CONFIG=galileo

  xxx_ti_lm3s6965_defconfig           -> xxx_basic_cortex_m3_defconfig
  xxx_generic_pc_atom_n28xx_defconfig -> xxx_basic_atom_defconfig
  xxx_generic_pc_minuteia_defconfig   -> xxx_basic_minuteia_defconfig
  xxx_quark_defconfig                 -> xxx_galileo_defconfig

Change-Id: I696eb8b9ad9a72d7a72efbe1341ce23500335764
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
78 files changed