ASoC: rt1011: some minor changes to improve readability

There is no other code use the RT1011_INIT_REG_LEN definition,
except rt1011_reg_init().
Hence, we remove it and fix the typo.

Signed-off-by: Shuming Fan <shumingf@realtek.com>
Link: https://lore.kernel.org/r/20191031115446.21108-1-shumingf@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>