Use regmap_update_bits() to replace regmap_read() + regmap_write().
With this patch, we only show the error message when regmap_update_bits()
fails.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: G.Shark Jeong<gshark.jeong@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>