UPSTREAM: regulator: helpers: Ensure bypass register field matches ON value

UPSTREAM: regulator: helpers: Ensure bypass register field matches ON value

When checking bypass state for a regulator, we check to see if any bits
in the bypass mask are set. For most cases this is fine because there is
typically, only a single bit used to determine if the regulator is in
bypass. However, for some regulators, such as LDO6 on AS3722, the bypass
state is indicate by a value rather than a single bit. Therefore, when
checking the bypass state, check that the bypass field matches the ON
value.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
(cherry picked from commit dd1a571daee7cdd6504a5771721e34f9b118f17a)

Change-Id: Ic9f9ee919969cc744be7e7c94729ee7ab9e0e7a1
Signed-off-by: David Wu <david.wu@rock-chips.com>