ppc patch queue for 2019-03-10 This pull requests supersedes ppc-for-4.0-20190310. Changes are: * Fixed a bunch of minor style problems * Suppressed warnings about Spectre/Meltdown mitigations with TCG * Added one more patch, a preliminary fix towards the not-quite-ready support for NVLink VFIO passthrough. This is a final pull request before the 4.0 soft freeze. Changes include: * A Great Renaming to use camel case properly in spapr code * Optimization of some vector instructions * Support for POWER9 cpus in the powernv machine * Fixes a regression from the last pull request in handling VSX instructions with mixed operands from the FPR and VMX parts of the register array * Optimization hack to avoid scanning all the (empty) entries on a new IOMMU window * Add FSL I2C controller model for E500 * Support for KVM acceleration of the H_PAGE_INIT hypercall on spapr * Update u-boot image for E500 * Enable Specre/Meltdown mitigations by default on the new machine type * Enable large decrementer support for POWER9