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[media] em28xx: use a better value for I2C timeouts
In the lack of a better spec, let's assume the timeout
values compatible with SMBus spec:
http://smbus.org/specs/smbus110.pdf
at chapter 8 - Electrical Characteristics of SMBus devices
Ok, SMBus is a subset of I2C, and not all devices will be
following it, but the timeout value before this patch was not
even following the spec.
So, while we don't have a better guess for it, use 35 + 1
ms as the timeout.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>