[PATCH AUTOSEL 4.18 055/136] powerpc/powernv/ioda2: Reduce upper limit for DMA window size

From: Alexey Kardashevskiy [ Upstream commit d3d4ffaae439981e1e441ebb125aa3588627c5d8 ] We use PHB in mode1 which uses bit 59 to select a correct DMA window. However there is mode2 which uses bits 59:55 and allows up to 32 DMA windows per a PE. Even though documentation does not clearly

[PATCH AUTOSEL 4.18 055/136] powerpc/powernv/ioda2: Reduce upper limit for DMA window size

From: Alexey Kardashevskiy [ Upstream commit d3d4ffaae439981e1e441ebb125aa3588627c5d8 ] We use PHB in mode1 which uses bit 59 to select a correct DMA window. However there is mode2 which uses bits 59:55 and allows up to 32 DMA windows per a PE. Even though documentation does not clearly