[roll] Roll fuchsia [arm][periphmap] Add `periph_vaddr_to_paddr`. Add a small function to the perhphmap code which in the inverse of `periph_paddr_to_vaddr`. Instead of giving the peripheral map virtual address for a peripheral's MMIO physical address, it takes a virtual which is expected to be in the peripheral map and translates it to a physical address instead. For context, I found this useful when writing some console commands for ARM SMMU debugging. It makes it easy for me to (during register dumps) to also print the physical address of the register being dumped, when the code doing the dumping has access to the vaddr of the registers, but not the paddr. Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1504798 Original-Revision: b9666f9f15ea645fa778a46a839b0d89d9c16412 GitOrigin-RevId: 5bd711dff399d3ec1ad2e656916769e9277e3265 Change-Id: Ib9b555409e88eeec13961f345314a6f16792c4ac
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