[platform/broadcom] DX010: configure pca954x device with idle_state

[pphuchar]

- Why I did it
Use the proper way to initialize the per-device configuration of the PCA954x MUX driver.

- How I did it
Configure the PCA9548 device behavior with the idle_state sysfs provides by the driver. Refer to the sonic-linux-kernel#177

- How to verify it
Boot the DX010 device and read the idle_state sysfs of each device. The result must be -2 (deselect channel on exit).

- Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012

- Description for the changelog

dx010 use idle_state sysfs for pca9548 device configuration.

- A picture of a cute animal (not mandatory but encouraged)

Test Log:
dx010-pca954x-using-idle_state-sysfs.log

[lguohan]

thanks, is this verified?

[pphuchar]

thanks, is this verified?

I have updated the PR description with a test log.

[paulmenzel]

Is cat: /sys/bus/i2c/drivers/pca95: No such file or directory a leftover in the test.log?

[pphuchar]

Is cat: /sys/bus/i2c/drivers/pca95: No such file or directory a leftover in the test.log?

Oh, right, its a left over. I have re-submit the log.

[lguohan]

/azp run Azure.sonic-buildimage

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