linux-yocto/3.19: CONFIG_ATA_BMDMA and gcc5 ARM64

linux-yocto/3.19: CONFIG_ATA_BMDMA and gcc5 ARM64

Integrating the following commit to remove a ATA configuration warning:

    common-pc-drivers: Enable CONFIG_ATA_BMDMA

    Enabling the ATA_BMDMA re-enables ATA_PIIX which was getting
    disabled

    Signed-off-by: Saul Wold <sgw@linux.intel.com>
And the following to fix the ARM64 gcc5 boot:

    arm64: psci: move psci firmware calls out of line

    An arm64 allmodconfig fails to build with GCC 5 due to __asmeq
    assertions in the PSCI firmware calling code firing due to mcount
    preambles breaking our assumptions about register allocation of
    function
    arguments:

      /tmp/ccDqJsJ6.s: Assembler messages:
      /tmp/ccDqJsJ6.s:60: Error: .err encountered
      /tmp/ccDqJsJ6.s:61: Error: .err encountered
      /tmp/ccDqJsJ6.s:62: Error: .err encountered
      /tmp/ccDqJsJ6.s:99: Error: .err encountered
      /tmp/ccDqJsJ6.s:100: Error: .err encountered
      /tmp/ccDqJsJ6.s:101: Error: .err encountered

    This patch fixes the issue by moving the PSCI calls out-of-line into
    their own assembly files, which are safe from the compiler's
    meddling
    fingers.

    Reported-by: Andy Whitcroft <apw@canonical.com>
    Signed-off-by: Will Deacon <will.deacon@arm.com>
    Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
    Signed-off-by: Armin Kuter <akuster@mvista.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>