arch: Make phys_initrd_start and phys_initrd_size global variables
Make phys_initrd_start and phys_initrd_size global variables declared in init/do_mounts_initrd.c such that we can later have generic code in drivers/of/fdt.c populate those variables for us. This requires both the ARM and unicore32 implementations to be properly guarded against CONFIG_BLK_DEV_INITRD, and also initialize the variables to the expected default values (unicore32). Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com> Reviewed-by: NMike Rapoport <rppt@linux.ibm.com> Signed-off-by: NRob Herring <robh@kernel.org>
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