ASoC: tas2562: Fixed incorrect amp_level setting.

According to the tas2562 datasheet,the bits[5:1] represents the amp_level value.
So to set the amp_level value correctly,the shift value should be set to 1.

Signed-off-by: Jonghwan Choi <charlie.jh@kakaocorp.com>
Acked-by: Dan Murphy <dmurphy@ti.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200319140043.GA6688@jhbirdchoi-MS-7B79


Signed-off-by: Mark Brown <broonie@kernel.org>