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Replace hwrng_register with devm_hwrng_register and let devres unregister our hwrng when the device is removed. It's possible to do this now that devres also handles clock disable+uprepare. When we had to disable+unprepare the clock ourselves, we had to unregister the hwrng before this and couldn't use devres. There's nothing left to do for imx_rngc_remove, this function can go. Signed-off-by: Martin Kaiser <martin@kaiser.cx> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>