i2c: algo: bit: Allow to skip bit test

An I2C bus can make use of shared resources. E.g. two GPIO based buses
that share a single SCL line. To synchronize access to the bus the driver
might use locking with the help of i2c_lock_operations(). While this
works for normal transfers it is not available during initialization.

Especially if i2c-algo-bit module is loaded with parameter bit_test
it will issue some basic sanity checks that will access the bus without
locking. This might interfere badly with concurrent transfers. Even
if these are well synchronized via locks.

Allow the consumer of an algorithm to override if the bit_test is allowed
or not. For this add a new boolean attribute named skip_bit_test to
i2c_algo_bit_data. If set the test is not run.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20260714162915.3018703-2-markus.stockhausen@gmx.de

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