hwrng: Kconfig - Remove leading spaces

Remove leading spaces before tabs in Kconfig file(s) by running the
following command:

  $ find drivers/char/hw_random -name 'Kconfig*' | x\
    args sed -r -i 's/^[ ]+\t/\t/'
Signed-off-by: NJuerg Haefliger <juergh@canonical.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>