efi_loader: replace a u16_strdup with alloc + memcpy
Heinrich reports that on RISC-V unaligned access is emulated by OpenSBI which is very slow. Performance wise it's better if we skip the calls to u16_strdup() -- which in turn calls u16_strsize() and just allocate/copy the memory directly. The access to dp.length may still be unaligned, but that's way less than what u16_strsize() would do Signed-off-by:Ilias Apalodimas <ilias.apalodimas@linaro.org> Use malloc() instead of calloc(). Reviewed-by:
Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
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