PCI/MSI: Provide a new set of mask and unmask functions
The existing mask/unmask functions are convoluted and generate suboptimal assembly code. Provide a new set of functions which will be used in later patches to replace the exisiting ones. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/875ywetozb.ffs@tglx
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