linux-yocto/4.12: bug fixes and feature backports

linux-yocto/4.12: bug fixes and feature backports

Integrating the following changes to the 4.12 tree:

 1b85adfc0b81 mtd: intel-spi: Add Intel Lewisburg PCH SPI super SKU PCI ID
 b373e336eb84 mtd: spi-nor: intel-spi: Add support for Intel Cedar Fork SPI serial flash
 c37662f04d7c mtd: spi-nor: intel-spi: Add support for Intel Lewisburg SPI serial flash
 a8a4ae37e8b7 mtd: spi-nor: intel-spi: Add support for Intel Denverton SPI serial flash controller
 aa830ab86985 net/bluetooth: make bluetooth socket can be created in net namespace
 2e98dc285831 x86/debug: Handle warnings before the notifier chain, to fix KGDB crash

These are all bug fixes, or mainline backports.

(From OE-Core rev: 7c4ed05c05629f8f551152153d893dfe048c1ee0)

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>