kernel/linux: fix using custom location

Currently, extract and patch are skipped as thus:
  - using a custom directory of pre-installed headers
  - a correctly named directory already exists

Otherwise, extract and patch are done.

The current second condition is wrong, because it allows the following
sequence to happen:
  - a non-custom kernel is used
  - a previous build only partially extracted the non-custom sources
  - that p[revious build broke during extraction (eg. incomplete tarball...)
  - a subsequent build will find a properly named directory, and will
    thus skip extract and patch, which is wrong

Fix that by following the conditions in this table:

Type                  | Extract | Patch
----------------------+---------+-------
Pre-installed headers |    N    |   N
custom directory      |    N    |   N
custom tarball        |    Y    |   N
mainstream tarball    |    Y    |   Y

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: David Holsgrove <david.holsgrove@xilinx.com>

0 files changed, 0 insertions, 0 deletions